1
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Iyer RR, Yang L, Sorrells JE, Chaney EJ, Spillman DR, Boppart SA. Dispersion mismatch correction for evident chromatic anomaly in low coherence interferometry. APL PHOTONICS 2024; 9:076114. [PMID: 39072189 PMCID: PMC11273218 DOI: 10.1063/5.0207414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 07/02/2024] [Indexed: 07/30/2024]
Abstract
The applications of ultrafast optics to biomedical microscopy have expanded rapidly in recent years, including interferometric techniques like optical coherence tomography and microscopy (OCT/OCM). The advances of ultra-high resolution OCT and the inclusion of OCT/OCM in multimodal systems combined with multiphoton microscopy have marked a transition from using pseudo-continuous broadband sources, such as superluminescent diodes, to ultrafast supercontinuum optical sources. We report anomalies in the dispersion profiles of low-coherence ultrafast pulses through long and non-identical arms of a Michelson interferometer that are well beyond group delay or third-order dispersions. This chromatic anomaly worsens the observed axial resolution and causes fringe artifacts in the reconstructed tomograms in OCT/OCM using traditional algorithms. We present DISpersion COmpensation Techniques for Evident Chromatic Anomalies (DISCOTECA) as a universal solution to address the problem of chromatic dispersion mismatch in interferometry, especially with ultrafast sources. First, we demonstrate the origin of these artifacts through the self-phase modulation of ultrafast pulses due to focusing elements in the beam path. Next, we present three solution paradigms for DISCOTECA: optical, optoelectronic, and computational, along with quantitative comparisons to traditional methods to highlight the improvements to the dynamic range and axial profile. We explain the piecewise reconstruction of the phase mismatch between the arms of the spectral-domain interferometer using a modified short-term Fourier transform algorithm inspired by spectroscopic OCT. Finally, we present a decision-making guide for evaluating the utility of DISCOTECA in interferometry and for the artifact-free reconstruction of OCT images using an ultrafast supercontinuum source for biomedical applications.
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Affiliation(s)
| | | | | | | | | | - Stephen A. Boppart
- Author to whom correspondence should be addressed: . Tel.: (217) 244-7479
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2
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Soh JH, Jansen TLC, Palacino-González E. Controlling the nonadiabatic dynamics of the charge-transfer process with chirped pulses: Insights from a double-pump time-resolved fluorescence spectroscopy scheme. J Chem Phys 2024; 160:024110. [PMID: 38193559 DOI: 10.1063/5.0177073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 12/04/2023] [Indexed: 01/10/2024] Open
Abstract
The manipulation of the ultrafast quantum dynamics of a molecular system can be achieved through the application of tailored light fields. This has been done in many ways in the past. In our present investigation, we show that it is possible to exert specific control over the nonadiabatic dynamics of a generic model system describing ultrafast charge-transfer within a condensed dissipative environment by using frequency-chirped pulses. By adjusting the external photoexcitation conditions, such as the chirp parameter, we show that the final population of the excitonic and charge-transfer states can be significantly altered, thereby influencing the elementary steps controlling the transfer process. In addition, we introduce an excitation scheme based on double-pump time-resolved fluorescence spectroscopy using chirped-pulse excitations. Here, our findings reveal that chirped excitations enhance the vibrational system dynamics as evidenced by the simulated spectra, where a substantial signal intensity dependence on the chirp is observed. Our simulations show that chirped pulses are a promising tool for steering the dynamics of the charge-transfer process toward a desired target outcome.
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Affiliation(s)
- Jia Hao Soh
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| | - Thomas L C Jansen
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| | - Elisa Palacino-González
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
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3
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He Y, Liu Z, Ott C, Pfeiffer AN, Sun S, Gaarde MB, Pfeifer T, Hu B. Resonant Perfect Absorption Yielded by Zero-Area Pulses. PHYSICAL REVIEW LETTERS 2022; 129:273201. [PMID: 36638297 DOI: 10.1103/physrevlett.129.273201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 08/11/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
We propose and study the manipulation of the macroscopic transient absorption of an ensemble of open two-level systems via temporal engineering. The key idea is to impose an ultrashort temporal gate on the polarization decay of the system by transient absorption spectroscopy, thus confining its free evolution and the natural reshaping of the excitation pulse. The numerical and analytical results demonstrate that even at moderate optical depths, the resonant absorption of light can be reduced or significantly enhanced by more than 5 orders of magnitude relative to that without laser manipulation. The achievement of the quasicomplete extinction of light at the resonant frequency, here referred to as resonant perfect absorption, arises from the full destructive interference between the excitation pulse and its subpulses developed and tailored during propagation, and is revealed to be connected with the formation of zero-area pulses in the time domain.
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Affiliation(s)
- Yu He
- School of Nuclear Science and Technology and Frontiers Science Center for Rare Isotopes, Lanzhou University, 730000 Lanzhou, China
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Zuoye Liu
- School of Nuclear Science and Technology and Frontiers Science Center for Rare Isotopes, Lanzhou University, 730000 Lanzhou, China
| | - Christian Ott
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Adrian N Pfeiffer
- Institute of Optics and Quantum Electronics, Abbe Center of Photonics, Friedrich Schiller University, Max-Wien-Platz 1, 07743 Jena, Germany
| | - Shaohua Sun
- School of Nuclear Science and Technology and Frontiers Science Center for Rare Isotopes, Lanzhou University, 730000 Lanzhou, China
| | - Mette B Gaarde
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - Thomas Pfeifer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Bitao Hu
- School of Nuclear Science and Technology and Frontiers Science Center for Rare Isotopes, Lanzhou University, 730000 Lanzhou, China
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4
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Woodworth TS, Hermann-Avigliano C, Chan KWC, Marino AM. Transmission estimation at the quantum Cramér-Rao bound with macroscopic quantum light. EPJ QUANTUM TECHNOLOGY 2022; 9:38. [PMID: 36573927 PMCID: PMC9780138 DOI: 10.1140/epjqt/s40507-022-00154-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Accepted: 11/18/2022] [Indexed: 06/17/2023]
Abstract
The field of quantum metrology seeks to apply quantum techniques and/or resources to classical sensing approaches with the goal of enhancing the precision in the estimation of a parameter beyond what can be achieved with classical resources. Theoretically, the fundamental minimum uncertainty in the estimation of a parameter for a given probing state is bounded by the quantum Cramér-Rao bound. From a practical perspective, it is necessary to find physical measurements that can saturate this fundamental limit and to show experimentally that it is possible to perform measurements with the required precision to do so. Here we perform experiments that saturate the quantum Cramér-Rao bound for transmission estimation over a wide range of transmissions when probing the system under study with a continuous wave bright two-mode squeezed state. To properly take into account the imperfections in the generation of the quantum state, we extend our previous theoretical results to incorporate the measured properties of the generated quantum state. For our largest transmission level of 84%, we show a 62% reduction over the optimal classical protocol in the variance in transmission estimation when probing with a bright two-mode squeezed state with -8 dB of intensity-difference squeezing. Given that transmission estimation is an integral part of many sensing protocols, such as plasmonic sensing, spectroscopy, calibration of the quantum efficiency of detectors, etc., the results presented promise to have a significant impact on a number of applications in various fields of research.
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Affiliation(s)
- Timothy S Woodworth
- Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma, Norman, Oklahoma 73019 USA
- Center for Quantum Research and Technology, The University of Oklahoma, Norman, Oklahoma 73019 USA
| | - Carla Hermann-Avigliano
- Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago, Chile
- ANID - Millennium Science Initiative Program - Millennium Institute for Research in Optics (MIRO), Santiago, Chile
| | | | - Alberto M Marino
- Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma, Norman, Oklahoma 73019 USA
- Center for Quantum Research and Technology, The University of Oklahoma, Norman, Oklahoma 73019 USA
- Quantum Information Science Section, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381 USA
- Quantum Science Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381 USA
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5
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Redding B, McKinney JD, Schermer RT, Murray JB. High-resolution wide-band optical frequency comb control using stimulated Brillouin scattering. OPTICS EXPRESS 2022; 30:22097-22106. [PMID: 36224916 DOI: 10.1364/oe.457796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 05/11/2022] [Indexed: 06/16/2023]
Abstract
We introduce a technique to manipulate an optical frequency comb on a line-by-line basis using stimulated Brillouin scattering (SBS). The narrow-linewidth SBS process has been used to address individual lines in optical frequency combs, but previous demonstrations required a dedicated laser to modulate each comb tooth, prohibiting complete comb control. Here, we use a pair of frequency shifting fiber optic loops to generate both an optical frequency comb and a train of frequency-locked pulses that can be used to manipulate the comb via SBS. This approach enables control of the entire frequency comb using a single seed laser without active frequency locking. To demonstrate the versatility of this technique, we generate and manipulate a comb consisting of 50 lines with 200 MHz spacing. By using polarization pulling assisted SBS, we achieve a modulation depth of 30 dB. This represents a scalable approach to control large numbers of comb teeth with high resolution using standard fiber-optic components.
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6
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Völkel A, Nimmesgern L, Mielnik-Pyszczorski A, Wirth T, Herink G. Intracavity Raman scattering couples soliton molecules with terahertz phonons. Nat Commun 2022; 13:2066. [PMID: 35440623 PMCID: PMC9018723 DOI: 10.1038/s41467-022-29649-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 03/28/2022] [Indexed: 11/15/2022] Open
Abstract
Ultrafast atomic vibrations mediate heat transport, serve as fingerprints for chemical bonds and drive phase transitions in condensed matter systems. Light pulses shorter than the atomic oscillation period can not only probe, but even stimulate and control collective excitations. In general, such interactions are performed with free-propagating pulses. Here, we demonstrate intra-cavity excitation and time-domain sampling of coherent optical phonons inside an active laser oscillator. Employing real-time spectral interferometry, we reveal that Terahertz beats of Raman-active optical phonons are the origin of soliton bound-states - also termed "Soliton molecules" - and we resolve a coherent coupling mechanism of phonon and intra-cavity soliton motion. Concurring electronic and nuclear refractive nonlinearities generate distinct soliton trajectories and, effectively, enhance the time-domain Raman signal. We utilize the intrinsic soliton motion to automatically perform highspeed Raman spectroscopy of the intra-cavity crystal. Our results pinpoint the impact of Raman-induced soliton interactions in crystalline laser media and microresonators, and offer unique perspectives toward ultrafast nonlinear phononics by exploiting the coupling of atomic motion and solitons inside a cavity.
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Affiliation(s)
- Alexandra Völkel
- Experimental Physics VIII-Ultrafast Dynamics, University of Bayreuth, 95440, Bayreuth, Germany
| | - Luca Nimmesgern
- Theoretical Physics III, University of Bayreuth, 95440, Bayreuth, Germany
| | - Adam Mielnik-Pyszczorski
- Theoretical Physics III, University of Bayreuth, 95440, Bayreuth, Germany
- Department of Theoretical Physics, Wrocław University of Science and Technology, 50-370, Wrocław, Poland
| | - Timo Wirth
- Experimental Physics VIII-Ultrafast Dynamics, University of Bayreuth, 95440, Bayreuth, Germany
| | - Georg Herink
- Experimental Physics VIII-Ultrafast Dynamics, University of Bayreuth, 95440, Bayreuth, Germany.
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7
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Abstract
Advances over the past decade have presented new avenues to achieve control over material properties using intense pulses of electromagnetic radiation, with frequencies ranging from optical (approximately 1 PHz, or 1015 Hz) down to below 1 THz (1012 Hz). Some of these new developments have arisen from new experimental methods to drive and observe transient material properties, while others have emerged from new computational techniques that have made nonequilibrium dynamics more tractable to our understanding. One common issue with most attempts to realize control using electromagnetic pulses is the dissipation of energy, which in many cases poses a limit due to uncontrolled heating and has led to strong interest in using lower frequency and/or highly specific excitations to minimize this effect. Emergent developments in experimental tools using shaped X-ray pulses may in the future offer new possibilities for material control, provided that the issue of heat dissipation can be resolved for higher frequency light. The concept of using appropriately shaped pulses of light to control the properties of materials has a range of potential applications, and relies on an understanding of intricate couplings within the material.![]()
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Affiliation(s)
- Steven L Johnson
- Institute for Quantum Electronics, ETH Zürich, Auguste-Piccard-Hof 1, 8093 Zürich, Switzerland.
- SwissFEL, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen PSI, Switzerland
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8
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Hu JW, Yu J, Han YC. Multi-path effect in population transfer dynamics of the photoassociation of hot Mg atoms by a femtosecond laser pulse. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Abstract
Abstract
We revisit low frequency coherent Raman spectroscopy (LF-CRS) and present a unified theoretical background that provides consistent physical pictures of LF-CRS signal generation. Our general framework allows to compute the signal to noise ratio in the multitude of possible LF-CRS, and more generally CRS, experimental implementations both in the spectral and time domain.
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10
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Lahiri J, Yuwono SH, Magoulas I, Moemeni M, Borhan B, Blanchard GJ, Piecuch P, Dantus M. Controlling Quantum Interference between Virtual and Dipole Two-Photon Optical Excitation Pathways Using Phase-Shaped Laser Pulses. J Phys Chem A 2021; 125:7534-7544. [PMID: 34415165 DOI: 10.1021/acs.jpca.1c03069] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two-photon excitation (TPE) proceeds via a "virtual" pathway, which depends on the accessibility of one or more intermediate states, and, in the case of non-centrosymmetric molecules, an additional "dipole" pathway involving the off-resonance dipole-allowed one-photon transitions and the change in the permanent dipole moment between the initial and final states. Here, we control the quantum interference between these two optical excitation pathways by using phase-shaped femtosecond laser pulses. We find enhancements by a factor of up to 1.75 in the two-photon-excited fluorescence of the photobase FR0-SB in methanol after taking into account the longer pulse duration of the shaped laser pulses. Simulations taking into account the different responses of the virtual and dipole pathways to external fields and the effect of pulse shaping on two-photon transitions are found to be in good agreement with our experimental measurements. The observed quantum control of TPE in the condensed phase may lead to an enhanced signal at a lower intensity in two-photon microscopy, multiphoton-excited photoreagents, and novel spectroscopic techniques that are sensitive to the magnitude of the contributions from the virtual and dipole pathways to multiphoton excitations.
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Affiliation(s)
- J Lahiri
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - S H Yuwono
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - I Magoulas
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - M Moemeni
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - B Borhan
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - G J Blanchard
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - P Piecuch
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States.,Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, United States
| | - M Dantus
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States.,Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, United States
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11
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Gaulier G, Dietschi Q, Bhattacharyya S, Schmidt C, Montagnese M, Chauvet A, Hermelin S, Chiodini F, Bonacina L, Herrera PL, Rothlisberger U, Rodriguez I, Wolf JP. Ultrafast pulse shaping modulates perceived visual brightness in living animals. SCIENCE ADVANCES 2021; 7:7/18/eabe1911. [PMID: 33910906 PMCID: PMC8081367 DOI: 10.1126/sciadv.abe1911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Vision is usually assumed to be sensitive to the light intensity and spectrum but not to its spectral phase. However, experiments performed on retinal proteins in solution showed that the first step of vision consists in an ultrafast photoisomerization that can be coherently controlled by shaping the phase of femtosecond laser pulses, especially in the multiphoton interaction regime. The link between these experiments in solution and the biological process allowing vision was not demonstrated. Here, we measure the electric signals fired from the retina of living mice upon femtosecond multipulse and single-pulse light stimulation. Our results show that the electrophysiological signaling is sensitive to the manipulation of the light excitation on a femtosecond time scale. The mechanism relies on multiple interactions with the light pulses close to the conical intersection, like pump-dump (photoisomerization interruption) and pump-repump (reverse isomerization) processes. This interpretation is supported both experimentally and by dynamics simulations.
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Affiliation(s)
- Geoffrey Gaulier
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Quentin Dietschi
- Department of Genetics and Evolution, University of Geneva, 30 Quai Ansermet, 1211 Geneva, Switzerland
| | - Swarnendu Bhattacharyya
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Cédric Schmidt
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Matteo Montagnese
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Adrien Chauvet
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Sylvain Hermelin
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Florence Chiodini
- Biobanque de tissus thérapeutiques, Department of Diagnostic, University Hospitals of Geneva, Rue Gabrielle-Perret-Gentil 4, 1205 Geneva, Switzerland
| | - Luigi Bonacina
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Pedro L Herrera
- Department of Genetic Medicine and Development, University of Geneva, 1 Rue Michel-Servet, 1211 Geneva, Switzerland
| | - Ursula Rothlisberger
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Ivan Rodriguez
- Department of Genetics and Evolution, University of Geneva, 30 Quai Ansermet, 1211 Geneva, Switzerland
| | - Jean-Pierre Wolf
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland.
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12
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Jo JY, Tanimura Y. Full molecular dynamics simulations of molecular liquids for single-beam spectrally controlled two-dimensional Raman spectroscopy. J Chem Phys 2021; 154:124115. [PMID: 33810650 DOI: 10.1063/5.0044661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Single-beam spectrally controlled (SBSC) two-dimensional (2D) Raman spectroscopy is a unique 2D vibrational measurement technique utilizing trains of short pulses that are generated from a single broadband pulse by pulse shaping. This approach overcomes the difficulty of 2D Raman spectroscopy in dealing with small-signal extraction and avoids complicated low-order cascading effects, thus providing a new possibility for measuring the intramolecular and intermolecular modes of molecular liquids using fifth-order 2D Raman spectroscopy. Recently, for quantitatively investigating the mode-mode coupling mechanism, Hurwitz et al. [Opt. Express 28, 3803 (2020)] have developed a new pulse design for this measurement to separate the contributions of the fifth- and third-order polarizations, which are often overlapped in the original single-beam measurements. Here, we describe a method for simulating these original measurements and the new 2D Raman measurements on the basis of a second-order response function approach. We carry out full molecular dynamics simulations for carbon tetrachloride and liquid water using an equilibrium-nonequilibrium hybrid algorithm, with the aim of explaining the key features of the SBSC 2D Raman spectroscopic method from a theoretical point of view. The predicted signal profiles and intensities provide valuable information that can be applied to 2D spectroscopy experiments, allowing them to be carried out more efficiently.
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Affiliation(s)
- Ju-Yeon Jo
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Yoshitaka Tanimura
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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13
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Boniface A, Mounaix M, Blochet B, de Aguiar HB, Quéré F, Gigan S. Spectrally resolved point-spread-function engineering using a complex medium. OPTICS EXPRESS 2021; 29:8985-8996. [PMID: 33820337 DOI: 10.1364/oe.403578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Propagation of an ultrashort pulse of light through strongly scattering media generates an intricate spatio-spectral speckle that can be described by means of the multi-spectral transmission matrix (MSTM). In conjunction with a spatial light modulator, the MSTM enables the manipulation of the pulse leaving the medium; in particular focusing it at any desired spatial position and/or time. Here, we demonstrate how to engineer the point-spread-function of the focused beam both spatially and spectrally, from the measured MSTM. It consists of numerically filtering the spatial content at each wavelength of the matrix prior to focusing. We experimentally report on the versatility of the technique through several examples, in particular as an alternative to simultaneous spatial and temporal focusing, with potential applications in multiphoton microscopy.
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14
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Lu HH, Simmerman EM, Lougovski P, Weiner AM, Lukens JM. Fully Arbitrary Control of Frequency-Bin Qubits. PHYSICAL REVIEW LETTERS 2020; 125:120503. [PMID: 33016737 DOI: 10.1103/physrevlett.125.120503] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/14/2020] [Indexed: 06/11/2023]
Abstract
Accurate control of two-level systems is a longstanding problem in quantum mechanics. One such quantum system is the frequency-bin qubit: a single photon existing in superposition of two discrete frequency modes. In this Letter, we demonstrate fully arbitrary control of frequency-bin qubits in a quantum frequency processor for the first time. We numerically establish optimal settings for multiple configurations of electro-optic phase modulators and pulse shapers, experimentally confirming near-unity mode-transformation fidelity for all fundamental rotations. Performance at the single-photon level is validated through the rotation of a single frequency-bin qubit to 41 points spread over the entire Bloch sphere, as well as tracking of the state path followed by the output of a tunable frequency beam splitter, with Bayesian tomography confirming state fidelities F_{ρ}>0.98 for all cases. Such high-fidelity transformations expand the practical potential of frequency encoding in quantum communications, offering exceptional precision and low noise in general qubit manipulation.
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Affiliation(s)
- Hsuan-Hao Lu
- School of Electrical and Computer Engineering and Purdue Quantum Science and Engineering Institute, Purdue University, West Lafayette, Indiana 47907, USA
| | - Emma M Simmerman
- Quantum Information Science Group, Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Pavel Lougovski
- Quantum Information Science Group, Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Andrew M Weiner
- School of Electrical and Computer Engineering and Purdue Quantum Science and Engineering Institute, Purdue University, West Lafayette, Indiana 47907, USA
| | - Joseph M Lukens
- Quantum Information Science Group, Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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15
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Kaufman B, Rozgonyi T, Marquetand P, Weinacht T. Coherent Control of Internal Conversion in Strong-Field Molecular Ionization. PHYSICAL REVIEW LETTERS 2020; 125:053202. [PMID: 32794883 DOI: 10.1103/physrevlett.125.053202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/25/2020] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Abstract
We demonstrate coherent control over internal conversion during strong-field molecular ionization with shaped, few-cycle laser pulses. The control is driven by interference in different neutral states, which are coupled via non-Born-Oppenheimer terms in the molecular Hamiltonian. Our measurements highlight the preservation of electronic coherence in nonadiabatic transitions between electronic states.
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Affiliation(s)
- Brian Kaufman
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA
| | - Tamás Rozgonyi
- Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary
- Research Centre for Natural Sciences, Magyar tudósok Körútja. 2, H-1117 Budapest, Hungary
| | - Philipp Marquetand
- University of Vienna, Faculty of Chemistry, Institute of Theoretical Chemistry, Währinger Straße 17, 1090 Wien, Austria
- Vienna Research Platform on Accelerating Photoreaction Discovery, University of Vienna, Währinger Straße 17, 1090 Wien, Austria
- University of Vienna, Faculty of Chemistry, Data Science @ Uni Vienna, Währinger Straße 29, 1090 Wien, Austria
| | - Thomas Weinacht
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA
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16
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Liu C, Liu W, Wang S, Li H, Lv Z, Zhang F, Zhang D, Teng J, Zheng T, Li D, Zhang M, Xu P, Gong Q. Super-resolution nanoscopy by coherent control on nanoparticle emission. SCIENCE ADVANCES 2020; 6:eaaw6579. [PMID: 32494590 PMCID: PMC7164939 DOI: 10.1126/sciadv.aaw6579] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 01/24/2020] [Indexed: 05/28/2023]
Abstract
Super-resolution nanoscopy based on wide-field microscopic imaging provided high efficiency but limited resolution. Here, we demonstrate a general strategy to push its resolution down to ~50 nm, which is close to the range of single molecular localization microscopy, without sacrificing the wide-field imaging advantage. It is done by actively and simultaneously modulating the characteristic emission of each individual emitter at high density. This method is based on the principle of excited state coherent control on single-particle two-photon fluorescence. In addition, the modulation efficiently suppresses the noise for imaging. The capability of the method is verified both in simulation and in experiments on ZnCdS quantum dot-labeled films and COS7 cells. The principle of coherent control is generally applicable to single-multiphoton imaging and various probes.
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Affiliation(s)
- Congyue Liu
- State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China
| | - Wei Liu
- State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China
| | - Shufeng Wang
- State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, Shanxi, China
- Frontiers Science Center for Nano-optoelectronics, Peking University, Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - Hongjia Li
- High Performance Computer Research Center, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Zhilong Lv
- High Performance Computer Research Center, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Fa Zhang
- High Performance Computer Research Center, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
| | - Donghui Zhang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education and State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Junlin Teng
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education and State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Tao Zheng
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Donghai Li
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Mingshu Zhang
- Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Pingyong Xu
- Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100101, China
| | - Qihuang Gong
- State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, Shanxi, China
- Frontiers Science Center for Nano-optoelectronics, Peking University, Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
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17
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Guo Y, Shu CC, Dong D, Nori F. Vanishing and Revival of Resonance Raman Scattering. PHYSICAL REVIEW LETTERS 2019; 123:223202. [PMID: 31868398 DOI: 10.1103/physrevlett.123.223202] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Indexed: 06/10/2023]
Abstract
The possibility to manipulate quantum coherence and interference, apart from its fundamental interest in quantum mechanics, is essential for controlling nonlinear optical processes such as high harmonic generation, multiphoton absorption, and stimulated Raman scattering. We show, analytically and numerically, how a nonlinear optical process via resonance Raman scattering (RRS) can be manipulated in a four-level double-Λ system by using pulsed laser fields. We find that two simultaneously excited RRS paths involved in the system can generate an ultimately destructive interference in the broad-bandwidth-limit regime. This, in turn, reduces the four-level system to an equivalent three-level system in a V configuration capable of naturally vanishing RRS effects. We further show that this counterintuitive phenomenon, i.e., the RRS vanishing, can be prevented by transferring a modulated phase of the laser pulse to the system at resonance frequencies. This work demonstrates a clear signature of both quantum destructive and constructive interference by actively controlling resonant multiphoton processes in multilevel quantum systems, and it therefore has potential applications in nonlinear optics, quantum control, and quantum information science.
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Affiliation(s)
- Yu Guo
- Hunan Key Laboratory of Super-Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, China
- Hunan Provincial Key Laboratory of Flexible Electronic Materials Genome Engineering, School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410114, China
| | - Chuan-Cun Shu
- Hunan Key Laboratory of Super-Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, China
- Theoretical Quantum Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - Daoyi Dong
- School of Engineering and Information Technology, University of New South Wales, Canberra, Australian Capital Territory 2600, Australia
| | - Franco Nori
- Theoretical Quantum Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
- Physics Department, University of Michigan, Ann Arbor, Michigan 48109, USA
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18
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Raanan D, Audier X, Shivkumar S, Asher M, Menahem M, Yaffe O, Forget N, Rigneault H, Oron D. Sub-second hyper-spectral low-frequency vibrational imaging via impulsive Raman excitation. OPTICS LETTERS 2019; 44:5153-5156. [PMID: 31674954 DOI: 10.1364/ol.44.005153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 09/20/2019] [Indexed: 06/10/2023]
Abstract
Real-time vibrational microscopy has been recently demonstrated by various techniques, most of them utilizing the well-known schemes of coherent anti-stokes Raman scattering and stimulated Raman scattering. These techniques readily provide valuable chemical information mostly in the higher vibrational frequency regime (>400 cm-1). Addressing the low vibrational frequency regime (<200 cm-1) is challenging due to the usage of spectral filters that are required to isolate the signal from the Rayleigh scattered excitation field. In this Letter, we report on rapid, high-resolution, low-frequency (<130 cm-1) vibrational microscopy using impulsive coherent Raman excitation. By combining impulsive excitation with a fast acousto-optic delay line, we detect the Raman-induced optical Kerr lensing and spectral shift effects with a 25 μs pixel dwell time to produce shot-noise limited, low-frequency hyper-spectral images of various samples.
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19
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Keren-Zur S, Ellenbogen T. Direct space to time terahertz pulse shaping with nonlinear metasurfaces. OPTICS EXPRESS 2019; 27:20837-20847. [PMID: 31510172 DOI: 10.1364/oe.27.020837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We present a method for the generation of THz pulses with tailored temporal shape from nonlinear metasurfaces. The method is based on single-cycle THz emission by the metasurface inclusions. We show that the spatial amplitude and phase structure of the nonlinear response is mapped to the temporal shape of pulses emitted at certain angles. We specifically show a method for reconstruction of desired pulses, generation of few-cycles pulses with tailored carrier-envelope and all-optical control over the pulse shape by the pump pulse characteristics.
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20
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Büchau F, Patas A, Yang Y, Lindinger A, Heyne K. A stage-scanning two-photon microscope equipped with a temporal and a spatial pulse shaper: Enhance fluorescence signal by phase shaping. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:123701. [PMID: 30599602 DOI: 10.1063/1.5025792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 11/12/2018] [Indexed: 06/09/2023]
Abstract
Here, we present a stage-scanning two-photon microscope (2PM) equipped with a temporal pulse shaper and a spatial light modulator enabling full control over spectral and spatial phases of the exciting laser pulse. We demonstrate the capability of correcting wavefronts and temporal pulse distortions without cross-dependencies induced by optical elements at the same time enhancing the fluorescence signal. We implemented phase resolved interferometric spectral modulation for temporal pulse shaping and the iterative feedback adaptive compensation technique for spatial pulse modulation as iterative techniques. Sample distortions were simulated by cover glass plates in the optical path and by chirping the exciting laser pulses. Optimization of the spectral and spatial phases results in a signal increase of 30% and nearly complete recovery of the losses. Applying a measured spatial compensation phase within a real leaf sample shows the enhancement in contrast due to wavefront shaping with local fluorescence increase up to 75%. The setup allows full independent control over spatial and spectral phases keeping or improving the spatial resolution of our microscope and provides the optimal tool for sensitive non-linear and coherent control microscopy.
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Affiliation(s)
- Frederik Büchau
- Department of Physics, Free University of Berlin, Arnimallee 14, D-14159 Berlin, Germany
| | - Alexander Patas
- Department of Physics, Free University of Berlin, Arnimallee 14, D-14159 Berlin, Germany
| | - Yang Yang
- Department of Physics, Free University of Berlin, Arnimallee 14, D-14159 Berlin, Germany
| | - Albrecht Lindinger
- Department of Physics, Free University of Berlin, Arnimallee 14, D-14159 Berlin, Germany
| | - Karsten Heyne
- Department of Physics, Free University of Berlin, Arnimallee 14, D-14159 Berlin, Germany
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21
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Fisher RS, Nobis D, Füchtbauer AF, Bood M, Grøtli M, Wilhelmsson LM, Jones AC, Magennis SW. Pulse-shaped two-photon excitation of a fluorescent base analogue approaches single-molecule sensitivity. Phys Chem Chem Phys 2018; 20:28487-28498. [PMID: 30412214 DOI: 10.1039/c8cp05496g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Fluorescent nucleobase analogues (FBAs) have many desirable features in comparison to extrinsic fluorescent labels, but they are yet to find application in ultrasensitive detection. Many of the disadvantages of FBAs arise from their short excitation wavelengths (often in the ultraviolet), making two-photon excitation a potentially attractive approach. Pentacyclic adenine (pA) is a recently developed FBA that has an exceptionally high two-photon brightness. We have studied the two-photon-excited fluorescence properties of pA and how they are affected by incorporation in DNA. We find that pA is more photostable under two-photon excitation than via resonant absorption. When incorporated in an oligonucleotide, pA has a high two-photon cross section and emission quantum yield, varying with sequence context, resulting in the highest reported brightness for such a probe. The use of a two-photon microscope with ultrafast excitation and pulse shaping has allowed the detection of pA-containing oligonucleotides in solution with a limit of detection of ∼5 molecules, demonstrating that practical single-molecule detection of FBAs is now within reach.
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Affiliation(s)
- Rachel S Fisher
- EaStCHEM School of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, UK.
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22
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Wilma K, Shu CC, Scherf U, Hildner R. Visualizing Hidden Ultrafast Processes in Individual Molecules by Single-Pulse Coherent Control. J Am Chem Soc 2018; 140:15329-15335. [DOI: 10.1021/jacs.8b08674] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kevin Wilma
- Soft Matter Spectroscopy, University of Bayreuth, 95440 Bayreuth, Germany
| | - Chuan-Cun Shu
- Institute of Super-Microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha 410083, China
- School of Engineering and Information Technology, University of New South Wales, Canberra, Australian Capital Territory 2600, Australia
| | - Ullrich Scherf
- Fachbereich C − Mathematik und Naturwissenschaften and Institut für Polymertechnologie, Universität Wuppertal, 42097 Wuppertal, Germany
| | - Richard Hildner
- Soft Matter Spectroscopy, University of Bayreuth, 95440 Bayreuth, Germany
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23
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Guo Y, Dong D, Shu CC. Optimal and robust control of quantum state transfer by shaping the spectral phase of ultrafast laser pulses. Phys Chem Chem Phys 2018; 20:9498-9506. [PMID: 29569663 DOI: 10.1039/c8cp00512e] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Achieving fast and efficient quantum state transfer is a fundamental task in physics, chemistry and quantum information science. However, the successful implementation of the perfect quantum state transfer also requires robustness under practically inevitable perturbative defects. Here, we demonstrate how an optimal and robust quantum state transfer can be achieved by shaping the spectral phase of an ultrafast laser pulse in the framework of frequency domain quantum optimal control theory. Our numerical simulations of the single dibenzoterrylene molecule as well as in atomic rubidium show that optimal and robust quantum state transfer via spectral phase modulated laser pulses can be achieved by incorporating a filtering function of the frequency into the optimization algorithm, which in turn has potential applications for ultrafast robust control of photochemical reactions.
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Affiliation(s)
- Yu Guo
- School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410114, China and School of Engineering and Information Technology, University of New South Wales, Canberra, Australian Capital Territory 2600, Australia and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control (Hunan Normal University), Ministry of Education, Changsha 410081, China
| | - Daoyi Dong
- School of Engineering and Information Technology, University of New South Wales, Canberra, Australian Capital Territory 2600, Australia
| | - Chuan-Cun Shu
- School of Engineering and Information Technology, University of New South Wales, Canberra, Australian Capital Territory 2600, Australia and Institute of Super-microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha 410083, China.
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24
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Raanan D, Ren L, Oron D, Silberberg Y. Impulsive Raman spectroscopy via precision measurement of frequency shift with low energy excitation. OPTICS LETTERS 2018; 43:470-473. [PMID: 29400817 DOI: 10.1364/ol.43.000470] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 12/19/2017] [Indexed: 06/07/2023]
Abstract
Stimulated Raman scattering (SRS) has recently become useful for chemically selective bioimaging. It is usually measured via modulation transfer from the pump beam to the Stokes beam. Impulsive stimulated Raman spectroscopy, on the other hand, relies on the spectral shift of ultrashort pulses as they propagate in a Raman active sample. This method was considered impractical with low energy pulses since the observed shifts are very small compared to the excitation pulse bandwidth, spanning many terahertz. Here we present a new apparatus, using tools borrowed from the field of precision measurement, for the detection of low-frequency Raman lines via stimulated-Raman-scattering-induced spectral shifts. This method does not require any spectral filtration and is therefore an excellent candidate to resolve low-lying Raman lines (<200 cm-1), which are commonly masked by the strong Rayleigh scattering peak. Having the advantage of the high repetition rate of the ultrafast oscillator, we reduce the noise level by implementing a lock-in detection scheme with a wavelength shift sensitivity well below 100 fm. This is demonstrated by the measurement of low-frequency Raman lines of various liquid samples.
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25
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Huang Y, Xu S. Controlling population of the molecular rotational state and the alignment theoretically by tailored femtosecond laser pulse. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171502. [PMID: 29410853 PMCID: PMC5792930 DOI: 10.1098/rsos.171502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 12/07/2017] [Indexed: 05/08/2023]
Abstract
We demonstrate that the population of the molecular rotational state through a stimulated impulsive Raman excitation can be controlled by tailoring the femtosecond laser pulse with a V-style phase modulation. The results show that, by precisely manipulating the modulation parameters, both the odd and even populations of the molecular rotational state can be completely suppressed or reconstructed. Meanwhile, the relative excitation between the odd and even populations can be obtained. Finally, we show that field-free molecular alignment can be controlled due to the modulation of the molecular rotational state populations.
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Affiliation(s)
| | - Shuwu Xu
- School of Science, Nantong University, Nantong 226007, People's Republic of China
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26
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Chen L, Palacino-González E, Gelin MF, Domcke W. Nonperturbative response functions: A tool for the interpretation of four-wave-mixing signals beyond third order. J Chem Phys 2017; 147:234104. [DOI: 10.1063/1.5004763] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Lipeng Chen
- Department of Chemistry, Technische Universität München, D-85747 Garching, Germany
| | | | - Maxim F. Gelin
- Department of Chemistry, Technische Universität München, D-85747 Garching, Germany
| | - Wolfgang Domcke
- Department of Chemistry, Technische Universität München, D-85747 Garching, Germany
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27
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Kowalewski M, Fingerhut BP, Dorfman KE, Bennett K, Mukamel S. Simulating Coherent Multidimensional Spectroscopy of Nonadiabatic Molecular Processes: From the Infrared to the X-ray Regime. Chem Rev 2017; 117:12165-12226. [DOI: 10.1021/acs.chemrev.7b00081] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Markus Kowalewski
- Department
of Chemistry and Department of Physics and Astronomy, University of California, Irvine, California 92697-2025, United States
| | - Benjamin P. Fingerhut
- Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, D-12489 Berlin, Germany
| | - Konstantin E. Dorfman
- State
Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Kochise Bennett
- Department
of Chemistry and Department of Physics and Astronomy, University of California, Irvine, California 92697-2025, United States
| | - Shaul Mukamel
- Department
of Chemistry and Department of Physics and Astronomy, University of California, Irvine, California 92697-2025, United States
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28
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Maehrlein S, Paarmann A, Wolf M, Kampfrath T. Terahertz Sum-Frequency Excitation of a Raman-Active Phonon. PHYSICAL REVIEW LETTERS 2017; 119:127402. [PMID: 29341630 DOI: 10.1103/physrevlett.119.127402] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Indexed: 06/07/2023]
Abstract
In stimulated Raman scattering, two incident optical waves induce a force oscillating at the difference of the two light frequencies. This process has enabled important applications such as the excitation and coherent control of phonons and magnons by femtosecond laser pulses. Here, we experimentally and theoretically demonstrate the so far neglected up-conversion counterpart of this process: THz sum-frequency excitation of a Raman-active phonon mode, which is tantamount to two-photon absorption by an optical transition between two adjacent vibrational levels. Coherent control of an optical lattice vibration of diamond is achieved by an intense terahertz pulse whose spectrum is centered at half the phonon frequency of 40 THz. Remarkably, the carrier-envelope phase of the THz pulse is directly transferred into the phase of the lattice vibration. New prospects in general infrared spectroscopy, action spectroscopy, and lattice trajectory control in the electronic ground state emerge.
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Affiliation(s)
- Sebastian Maehrlein
- Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Alexander Paarmann
- Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Martin Wolf
- Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Tobias Kampfrath
- Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
- Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
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29
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Levanon A, Dahan A, Nagler A, Lifshitz E, Bahar E, Mrejen M, Suchowski H. Pulse shaping of broadband adiabatic SHG from a Ti-sapphire oscillator. OPTICS LETTERS 2017; 42:2992-2995. [PMID: 28957227 DOI: 10.1364/ol.42.002992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 07/05/2017] [Indexed: 06/07/2023]
Abstract
We experimentally demonstrate an efficient broadband second-harmonic generation (SHG) process with a tunable mode-locked Ti:sapphire oscillator. We have achieved a robust broadband and efficient flat conversion of more than 35 nm wavelength by designing an adiabatic aperiodically poled potassium titanyl phosphate crystal. Moreover, we have shown that with such efficient flat conversion, we can shape and control broadband second-harmonic pulses. More specifically, we assign a spectral phase of absolute value and π-step, which allows wavelength tunable intense pump-probe and amplitude modulation of the broadband second-harmonic output. Such spectral phases serve as a proof of concept for other pulse-shaping applications for nonlinear spectroscopy and imaging.
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30
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Eliezer Y, Hareli L, Lobachinsky L, Froim S, Bahabad A. Breaking the Temporal Resolution Limit by Superoscillating Optical Beats. PHYSICAL REVIEW LETTERS 2017; 119:043903. [PMID: 29341733 DOI: 10.1103/physrevlett.119.043903] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Indexed: 05/25/2023]
Abstract
Band-limited functions can oscillate locally at an arbitrarily fast rate through an interference phenomenon known as superoscillations. Using an optical pulse with a superoscillatory envelope we experimentally break the temporal Fourier-transform focusing limit with a temporal feature that is approximately three times shorter than the duration of a transform-limited Gaussian pulse having a comparable bandwidth while maintaining 30% visibility. We experimentally demonstrate the ability of such signals to achieve temporal superresolution and show numerically in which cases such pulses can outperform transform-limited pulses.
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Affiliation(s)
- Yaniv Eliezer
- Department of Physical Electronics, School of Electrical Engineering, Fleischman Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Liran Hareli
- Department of Physical Electronics, School of Electrical Engineering, Fleischman Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Lilya Lobachinsky
- Department of Physical Electronics, School of Electrical Engineering, Fleischman Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Sahar Froim
- Department of Physical Electronics, School of Electrical Engineering, Fleischman Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Alon Bahabad
- Department of Physical Electronics, School of Electrical Engineering, Fleischman Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel
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31
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Accanto N, de Roque PM, Galvan-Sosa M, Christodoulou S, Moreels I, van Hulst NF. Rapid and robust control of single quantum dots. LIGHT, SCIENCE & APPLICATIONS 2017; 6:e16239. [PMID: 30167237 PMCID: PMC6062170 DOI: 10.1038/lsa.2016.239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 09/07/2016] [Accepted: 09/26/2016] [Indexed: 06/01/2023]
Abstract
The combination of single particle detection and ultrafast laser pulses is an instrumental method to track dynamics at the femtosecond time scale in single molecules, quantum dots and plasmonic nanoparticles. Optimal control of the extremely short-lived coherences of these individual systems has so far remained elusive, yet its successful implementation would enable arbitrary external manipulation of otherwise inaccessible nanoscale dynamics. In ensemble measurements, such control is often achieved by resorting to a closed-loop optimization strategy, where the spectral phase of a broadband laser field is iteratively optimized. This scheme needs long measurement times and strong signals to converge to the optimal solution. This requirement is in conflict with the nature of single emitters whose signals are weak and unstable. Here we demonstrate an effective closed-loop optimization strategy capable of addressing single quantum dots at room temperature, using as feedback observable the two-photon photoluminescence induced by a phase-controlled broadband femtosecond laser. Crucial to the optimization loop is the use of a deterministic and robust-against-noise search algorithm converging to the theoretically predicted solution in a reduced amount of steps, even when operating at the few-photon level. Full optimization of the single dot luminescence is obtained within ~100 trials, with a typical integration time of 100 ms per trial. These times are faster than the typical photobleaching times in single molecules at room temperature. Our results show the suitability of the novel approach to perform closed-loop optimizations on single molecules, thus extending the available experimental toolbox to the active control of nanoscale coherences.
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Affiliation(s)
- Nicolò Accanto
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | - Pablo M de Roque
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | | | - Sotirios Christodoulou
- Istituto Italiano di Tecnologia, 16163 Genova, Italy
- Department of Physics, University of Genova, 16146 Genova, Italy
| | - Iwan Moreels
- Istituto Italiano di Tecnologia, 16163 Genova, Italy
| | - Niek F van Hulst
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
- ICREA - Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain
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32
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Rao BJ, Gelin MF, Domcke W. Resonant femtosecond stimulated Raman spectroscopy with an intense actinic
pump pulse: Application to conical intersections. J Chem Phys 2017; 146:084105. [DOI: 10.1063/1.4976317] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- B. Jayachander Rao
- Department of Chemistry, Technische Universität München,
D-85747 Garching, Germany
| | - Maxim F. Gelin
- Department of Chemistry, Technische Universität München,
D-85747 Garching, Germany
| | - Wolfgang Domcke
- Department of Chemistry, Technische Universität München,
D-85747 Garching, Germany
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33
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Liu Z, Wang Q, Ding J, Cavaletto SM, Pfeifer T, Hu B. Observation and quantification of the quantum dynamics of a strong-field excited multi-level system. Sci Rep 2017; 7:39993. [PMID: 28051167 PMCID: PMC5209658 DOI: 10.1038/srep39993] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 11/30/2016] [Indexed: 11/29/2022] Open
Abstract
The quantum dynamics of a V-type three-level system, whose two resonances are first excited by a weak probe pulse and subsequently modified by another strong one, is studied. The quantum dynamics of the multi-level system is closely related to the absorption spectrum of the transmitted probe pulse and its modification manifests itself as a modulation of the absorption line shape. Applying the dipole-control model, the modulation induced by the second strong pulse to the system’s dynamics is quantified by eight intensity-dependent parameters, describing the self and inter-state contributions. The present study opens the route to control the quantum dynamics of multi-level systems and to quantify the quantum-control process.
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Affiliation(s)
- Zuoye Liu
- School of Nuclear Science and Technology, Lanzhou University, 730000, China
| | - Quanjun Wang
- School of Nuclear Science and Technology, Lanzhou University, 730000, China
| | - Jingjie Ding
- School of Nuclear Science and Technology, Lanzhou University, 730000, China
| | | | - Thomas Pfeifer
- Max-Planck-Institut für Kernphysik, Heidelberg, 69117, Germany
| | - Bitao Hu
- School of Nuclear Science and Technology, Lanzhou University, 730000, China
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34
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Full molecular dynamics simulations of liquid water and carbon tetrachloride for two-dimensional Raman spectroscopy in the frequency domain. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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35
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Dorfman KE, Zhang Y, Mukamel S. Coherent control of long-range photoinduced electron transfer by stimulated X-ray Raman processes. Proc Natl Acad Sci U S A 2016; 113:10001-6. [PMID: 27559082 PMCID: PMC5018741 DOI: 10.1073/pnas.1610729113] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
We show that X-ray pulses resonant with selected core transitions can manipulate electron transfer (ET) in molecules with ultrafast and atomic selectivity. We present possible protocols for coherently controlling ET dynamics in donor-bridge-acceptor (DBA) systems by stimulated X-ray resonant Raman processes involving various transitions between the D, B, and A sites. Simulations presented for a Ru(II)-Co(III) model complex demonstrate how the shapes, phases and amplitudes of the X-ray pulses can be optimized to create charge on demand at selected atoms, by opening up otherwise blocked ET pathways.
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Affiliation(s)
| | - Yu Zhang
- Department of Chemistry, University of California, Irvine, CA 92697
| | - Shaul Mukamel
- Department of Chemistry, University of California, Irvine, CA 92697; Department of Physics and Astronomy, University of California, Irvine, CA 92697
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36
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Gao Y, Galperin M. Simulation of optical response functions in molecular junctions. J Chem Phys 2016; 144:244106. [DOI: 10.1063/1.4954407] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yi Gao
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA
| | - Michael Galperin
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA
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37
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Liu J, Prezhdo OV. Chlorine doping reduces electron-hole recombination in lead iodide perovskites: time-domain ab initio analysis. J Phys Chem Lett 2015; 6:4463-4469. [PMID: 26505613 DOI: 10.1021/acs.jpclett.5b02355] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Rapid development in lead halide perovskites has led to solution-processable thin film solar cells with power conversion efficiencies close to 20%. Nonradiative electron-hole recombination within perovskites has been identified as the main pathway of energy losses, competing with charge transport and limiting the efficiency. Using nonadiabatic (NA) molecular dynamics, combined with time-domain density functional theory, we show that nonradiative recombination happens faster than radiative recombination and long-range charge transfer to an acceptor material. Doping of lead iodide perovskites with chlorine atoms reduces charge recombination. On the one hand, chlorines decrease the NA coupling because they contribute little to the wave functions of the valence and conduction band edges. On the other hand, chlorines shorten coherence time because they are lighter than iodines and introduce high-frequency modes. Both factors favor longer excited-state lifetimes. The simulation shows good agreement with the available experimental data and contributes to the comprehensive understanding of electronic and vibrational dynamics in perovskites. The generated insights into design of higher-efficiency solar cells range from fundamental scientific principles, such as the role of electron-vibrational coupling and quantum coherence, to practical guidelines, such as specific suggestions for chemical doping.
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Affiliation(s)
- Jin Liu
- Department of Chemical Engineering, University of Rochester , Rochester, New York 14627, United States
| | - Oleg V Prezhdo
- Department of Chemistry, University of Southern California , Los Angeles, California 90089, United States
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38
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Brückner L, Buckup T, Motzkus M. Enhancement of coherent anti-Stokes Raman signal via tailored probing in spectral focusing. OPTICS LETTERS 2015; 40:5204-5207. [PMID: 26565835 DOI: 10.1364/ol.40.005204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A novel approach for spectral focusing using a single-beam coherent anti-Stokes Raman scattering setup with a pulse shaper controlling the phase and amplitude is presented. By identifying the frequencies acting as the pump, Stokes, and probe, the high degree of control can be exploited in order to specifically and independently tailor the spectral region to act only as probe to achieve the highest signal intensity. While maintaining the optimal excitation of the vibrational coherence, a signal increase by a factor of six in comparison with usual spectral focusing schemes is readily obtained. The signal improvement and contrast is demonstrated on human skin tissue.
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39
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Karunakaran V. Ultrafast Heme Dynamics of Ferric Cytochrome c in Different Environments: Electronic, Vibrational, and Conformational Relaxation. Chemphyschem 2015; 16:3974-83. [DOI: 10.1002/cphc.201500672] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 09/23/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Venugopal Karunakaran
- Photosciences and Photonics Section; Chemical Sciences and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology; Thiruvananthapuram 695 019 Kerala India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi 110 001 India
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40
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Weigel A, Sebesta A, Kukura P. Shaped and Feedback-Controlled Excitation of Single Molecules in the Weak-Field Limit. J Phys Chem Lett 2015; 6:4032-7. [PMID: 26706166 PMCID: PMC5322473 DOI: 10.1021/acs.jpclett.5b01748] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 09/17/2015] [Indexed: 05/30/2023]
Abstract
Coherent control uses tailored femtosecond pulse shapes to influence quantum pathways and drive a light-induced process toward a specific outcome. There has been a long-standing debate whether the absorption properties or the probability for population to remain in an excited state of a molecule can be influenced by the pulse shape, even if only a single photon is absorbed. Most such experiments are performed on many molecules simultaneously, so that ensemble averaging reduces the access to quantum effects. Here, we demonstrate systematic coherent control experiments on the fluorescence intensity of a single molecule in the weak-field limit. We demonstrate that a delay scan of interfering pulses reproduces the excitation spectrum of the molecule upon Fourier transformation, but that the spectral phase of a pulse sequence does not affect the transition probability. We generalize this result to arbitrary pulse shapes by performing the first closed-loop coherent control experiments on a single molecule.
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Affiliation(s)
- Alexander Weigel
- Physical
and Theoretical
Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Aleksandar Sebesta
- Physical
and Theoretical
Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Philipp Kukura
- Physical
and Theoretical
Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
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41
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Mårsell E, Losquin A, Svärd R, Miranda M, Guo C, Harth A, Lorek E, Mauritsson J, Arnold CL, Xu H, L’Huillier A, Mikkelsen A. Nanoscale Imaging of Local Few-Femtosecond Near-Field Dynamics within a Single Plasmonic Nanoantenna. NANO LETTERS 2015; 15:6601-8. [PMID: 26375959 PMCID: PMC4621049 DOI: 10.1021/acs.nanolett.5b02363] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/11/2015] [Indexed: 05/22/2023]
Abstract
The local enhancement of few-cycle laser pulses by plasmonic nanostructures opens up for spatiotemporal control of optical interactions on a nanometer and few-femtosecond scale. However, spatially resolved characterization of few-cycle plasmon dynamics poses a major challenge due to the extreme length and time scales involved. In this Letter, we experimentally demonstrate local variations in the dynamics during the few strongest cycles of plasmon-enhanced fields within individual rice-shaped silver nanoparticles. This was done using 5.5 fs laser pulses in an interferometric time-resolved photoemission electron microscopy setup. The experiments are supported by finite-difference time-domain simulations of similar silver structures. The observed differences in the field dynamics across a single particle do not reflect differences in plasmon resonance frequency or dephasing time. They instead arise from a combination of retardation effects and the coherent superposition between multiple plasmon modes of the particle, inherent to a few-cycle pulse excitation. The ability to detect and predict local variations in the few-femtosecond time evolution of multimode coherent plasmon excitations in rationally synthesized nanoparticles can be used in the tailoring of nanostructures for ultrafast and nonlinear plasmonics.
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Affiliation(s)
- Erik Mårsell
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Arthur Losquin
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Robin Svärd
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Miguel Miranda
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Chen Guo
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Anne Harth
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Eleonora Lorek
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Johan Mauritsson
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Cord L. Arnold
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Hongxing Xu
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
- School of Physics and Technology, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Anne L’Huillier
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Anders Mikkelsen
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
- E-mail:
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42
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Gu C, Chang Y, Zhang D, Cheng J, Chen SC. Femtosecond laser pulse shaping at megahertz rate via a digital micromirror device. OPTICS LETTERS 2015; 40:4018-4021. [PMID: 26368701 DOI: 10.1364/ol.40.004018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this Letter, we present a scanner and digital micromirror device (DMD)-based ultrafast pulse shaper, i.e., S-DUPS, for programmable ultrafast pulse modulation, achieving a shaping rate of 2 MHz. To our knowledge, the S-DUPS is the fastest programmable pulse shaper reported to date. In the S-DUPS, the frequency spectrum of the input pulsed laser is first spread horizontally, and then mapped to a thin stripe on the DMD programmed with phase modulation patterns. A galvanometric scanner, synchronized with the DMD, subsequently scans the spectrum vertically on the DMD to achieve a shaping rate up to 10 s MHz. A grating pair and a cylindrical lens in front of the DMD compensate for the temporal and spatial dispersion of the system. To verify the concept, experiments were conducted with the DMD and the galvanometric scanner operated at 2 kHz and 1 kHz, respectively, achieving a 2 MHz speed for continuous group velocity dispersion tuning, as well as 2% efficiency. Up to 5% efficiency of S-DUPS can be expected with high efficiency gratings and optical components of proper coatings.
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43
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Rodriguez Y, Frei F, Cannizzo A, Feurer T. Pulse-shaping assisted multidimensional coherent electronic spectroscopy. J Chem Phys 2015; 142:212451. [DOI: 10.1063/1.4921793] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Yuseff Rodriguez
- Institute of Applied Physics, University of Bern, Sidlerstasse 5, CH-3012 Bern, Switzerland
| | - Franziska Frei
- Institute of Applied Physics, University of Bern, Sidlerstasse 5, CH-3012 Bern, Switzerland
| | - Andrea Cannizzo
- Institute of Applied Physics, University of Bern, Sidlerstasse 5, CH-3012 Bern, Switzerland
| | - Thomas Feurer
- Institute of Applied Physics, University of Bern, Sidlerstasse 5, CH-3012 Bern, Switzerland
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44
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Curchod BFE, Penfold TJ, Rothlisberger U, Tavernelli I. Local Control Theory in Trajectory Surface Hopping Dynamics Applied to the Excited-State Proton Transfer of 4-Hydroxyacridine. Chemphyschem 2015; 16:2127-33. [PMID: 26036986 DOI: 10.1002/cphc.201500190] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Indexed: 11/08/2022]
Abstract
The application of local control theory combined with nonadiabatic ab initio molecular dynamics to study the photoinduced intramolecular proton transfer reaction in 4-hydroxyacridine was investigated. All calculations were performed within the framework of linear-response time-dependent density functional theory. The computed pulses revealed important information about the underlying excited-state nuclear dynamics highlighting the involvement of collective vibrational modes that would normally be neglected in a study performed on model systems constrained to a subset of the full configuration space. This study emphasizes the strengths of local control theory for the design of pulses that can trigger chemical reactions associated with the population of a given molecular excited state. In addition, analysis of the generated pulses can help to shed new light on the photophysics and photochemistry of complex molecular systems.
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Affiliation(s)
- Basile F E Curchod
- Laboratory of Computational Chemistry and Biochemistry, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne (Switzerland).,Current address: Department of Chemistry, Stanford University, Stanford, California 94305 (USA)
| | | | - Ursula Rothlisberger
- Laboratory of Computational Chemistry and Biochemistry, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne (Switzerland)
| | - Ivano Tavernelli
- Laboratory of Computational Chemistry and Biochemistry, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne (Switzerland). .,Current address: IBM Research GmbH, Zurich Research Laboratory, 8803 Rüschlikon (Switzerland).
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45
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Solá IR, González-Vázquez J, de Nalda R, Bañares L. Strong field laser control of photochemistry. Phys Chem Chem Phys 2015; 17:13183-200. [PMID: 25835746 DOI: 10.1039/c5cp00627a] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strong ultrashort laser pulses have opened new avenues for the manipulation of photochemical processes like photoisomerization or photodissociation. The presence of light intense enough to reshape the potential energy surfaces may steer the dynamics of both electrons and nuclei in new directions. A controlled laser pulse, precisely defined in terms of spectrum, time and intensity, is the essential tool in this type of approach to control chemical dynamics at a microscopic level. In this Perspective we examine the current strategies developed to achieve control of chemical processes with strong laser fields, as well as recent experimental advances that demonstrate that properties like the molecular absorption spectrum, the state lifetimes, the quantum yields and the velocity distributions in photodissociation processes can be controlled by the introduction of carefully designed strong laser fields.
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Affiliation(s)
- Ignacio R Solá
- Departamento de Química Física I (Unidad Asociada de I+D+i al CSIC), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
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46
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Flynn DC, Bhagwat AR, Brenner MH, Núñez MF, Mork BE, Cai D, Swanson JA, Ogilvie JP. Pulse-shaping based two-photon FRET stoichiometry. OPTICS EXPRESS 2015; 23:3353-72. [PMID: 25836193 PMCID: PMC4394757 DOI: 10.1364/oe.23.003353] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 01/09/2015] [Accepted: 01/13/2015] [Indexed: 06/04/2023]
Abstract
Förster Resonance Energy Transfer (FRET) based measurements that calculate the stoichiometry of intermolecular interactions in living cells have recently been demonstrated, where the technique utilizes selective one-photon excitation of donor and acceptor fluorophores to isolate the pure FRET signal. Here, we present work towards extending this FRET stoichiometry method to employ two-photon excitation using a pulse-shaping methodology. In pulse-shaping, frequency-dependent phases are applied to a broadband femtosecond laser pulse to tailor the two-photon excitation conditions to preferentially excite donor and acceptor fluorophores. We have also generalized the existing stoichiometry theory to account for additional cross-talk terms that are non-vanishing under two-photon excitation conditions. Using the generalized theory we demonstrate two-photon FRET stoichiometry in live COS-7 cells expressing fluorescent proteins mAmetrine as the donor and tdTomato as the acceptor.
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Affiliation(s)
- Daniel C. Flynn
- Macromolecular Science and Engineering, University of Michigan, 2300 Hayward St, Ann Arbor, MI 48109
USA
| | - Amar R. Bhagwat
- Department of Physics, University of Michigan, 450 Church St., Ann Arbor, MI 48109
USA
| | - Meredith H. Brenner
- Applied Physics Program, University of Michigan, 450 Church St., Ann Arbor, MI 48109
USA
| | - Marcos F. Núñez
- Biophysics Program, University of Michigan, 930 N. University Ave., Ann Arbor, MI 48109
USA
| | - Briana E. Mork
- Department of Physics, University of Michigan, 450 Church St., Ann Arbor, MI 48109
USA
| | - Dawen Cai
- Department of Microbiology and Immunology, University of Michigan Medical School, 1150 West Medical Center Drive, Ann Arbor, MI 48109
USA
- Department of Cell and Developmental Biology, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI 48109
USA
| | - Joel A. Swanson
- Department of Microbiology and Immunology, University of Michigan Medical School, 1150 West Medical Center Drive, Ann Arbor, MI 48109
USA
| | - Jennifer P. Ogilvie
- Department of Physics, University of Michigan, 450 Church St., Ann Arbor, MI 48109
USA
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47
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Gandman A, Rybak L, Amitay Z. Observation and symmetry-based coherent control of transient two-photon absorption: the bright side of dark pulses. PHYSICAL REVIEW LETTERS 2014; 113:043003. [PMID: 25105615 DOI: 10.1103/physrevlett.113.043003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Indexed: 06/03/2023]
Abstract
We present and experimentally demonstrate for the first time the observation and femtosecond coherent control over the temporal evolution of a transient population that is excited via nonresonant two-photon absorption. Based on symmetry properties of the two-photon absorption process, the exciting femtosecond pulses are phase-shaped to photoinduce different evolutions of the transient excited population for a given final excited population. As a study case, we focus here on the attractive case of two-photon dark pulses that, although inducing zero final population (hence, the terminology of "dark pulses"), they induce a transient excited population during the pulse irradiation that can significantly deviate from zero. This nonzero transient population can be viewed as the bright side of such dark pulses. The symmetry-based coherent control is demonstrated first with dark pulses that we shape to induce transient excited population that at all times is kept below different target levels. Then, it is further demonstrated with pairs of dark pulses where one is rationally shaped to induce temporal evolution of the transient excited population that is the inverse of the evolution induced by the other. The work is conducted in the weak-field regime with the sodium atom as the model system. The approach developed here is general, conceptually simple, and very effective.
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Affiliation(s)
- Andrey Gandman
- The Shirlee Jacobs Femtosecond Laser Research Laboratory, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Leonid Rybak
- The Shirlee Jacobs Femtosecond Laser Research Laboratory, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Zohar Amitay
- The Shirlee Jacobs Femtosecond Laser Research Laboratory, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
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48
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Alfonso-García A, Mittal R, Lee ES, Potma EO. Biological imaging with coherent Raman scattering microscopy: a tutorial. JOURNAL OF BIOMEDICAL OPTICS 2014; 19:71407. [PMID: 24615671 PMCID: PMC4019423 DOI: 10.1117/1.jbo.19.7.071407] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 01/27/2014] [Indexed: 05/05/2023]
Abstract
Coherent Raman scattering (CRS) microscopy is gaining acceptance as a valuable addition to the imaging toolset of biological researchers. Optimal use of this label-free imaging technique benefits from a basic understanding of the physical principles and technical merits of the CRS microscope. This tutorial offers qualitative explanations of the principles behind CRS microscopy and provides information about the applicability of this nonlinear optical imaging approach for biological research.
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Affiliation(s)
| | - Richa Mittal
- University of California, Beckman Laser Institute, Irvine, California 92697
| | - Eun Seong Lee
- Center for Nano-Bio Technology, Division of Convergence Technology, Korea Research Institute of Standards and Science, 1 Doryong-Dong, Yuseong-Gu, Daejeon 305-340, Republic of Korea
| | - Eric O. Potma
- University of California, Beckman Laser Institute, Irvine, California 92697
- Address all correspondence to: Eric O. Potma, E-mail:
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49
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Li B, Xu Y, An L, Lin Q, Zhu H, Lin F, Li Y. Quantum focusing and coherent control of nonresonant two-photon absorption in frequency domain. OPTICS LETTERS 2014; 39:2443-2446. [PMID: 24979014 DOI: 10.1364/ol.39.002443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We theoretically investigate the nonresonant two-photon absorption (TPA) process in a two-level atom induced by a weak chirped pulse in the frequency domain. According to the extremum condition of the two-photon transition probability (TPTP) at the transition center frequency, we propose a Fresnel-inspired pulse tailoring scheme for TPA that is significantly different from that of Broers et al. [Phys. Rev. A46, 2749 (1992)]. Using this scheme, the TPTP can be focused or eliminated completely by constructively or destructively modulating various pathways of the quantum interference. Our results are a significant improvement on those obtained by Broers et al. and will have potential applications in selective two-photon microscopy and spectroscopy.
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50
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Glenn R, Mukamel S. Multidimensional spectroscopy with a single broadband phase-shaped laser pulse. J Chem Phys 2014; 140:144105. [DOI: 10.1063/1.4869750] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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