1
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Hu K, Yi L. Generation of Isolated Subfemtosecond Electron Bunches by the Diffraction of a Polarization-Tailored Intense Laser Beam. PHYSICAL REVIEW LETTERS 2024; 133:045001. [PMID: 39121395 DOI: 10.1103/physrevlett.133.045001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 06/24/2024] [Indexed: 08/11/2024]
Abstract
We propose utilizing a polarization-tailored high-power laser pulse to extract and accelerate electrons from the edge of a solid foil target to produce isolated subfemtosecond electron bunches. The laser pulse consists of two orthogonally polarized components with a time delay comparable to the pulse duration, such that the polarization in the middle of the pulse rapidly rotates over 90° within few optical cycles. Three-dimensional particle-in-cell simulations show that when such a light pulse diffracts at the edge of a plasma foil, a series of isolated relativistic electron bunches are emitted into separated azimuthal angles determined by the varying polarization. In comparison with most other methods that require an ultrashort drive laser, we show the proposed scheme works well with typical multicycle (∼30 fs) pulses from high-power laser facilities. The generated electron bunches have typical durations of a few hundred attoseconds and charges of tens of picocoulombs.
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Affiliation(s)
| | - Longqing Yi
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 201210, China
- Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
- Key Laboratory for Laser Plasmas (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
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2
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Gross N, Kuhs CT, Ostovar B, Chiang WY, Wilson KS, Volek TS, Faitz ZM, Carlin CC, Dionne JA, Zanni MT, Gruebele M, Roberts ST, Link S, Landes CF. Progress and Prospects in Optical Ultrafast Microscopy in the Visible Spectral Region: Transient Absorption and Two-Dimensional Microscopy. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:14557-14586. [PMID: 37554548 PMCID: PMC10406104 DOI: 10.1021/acs.jpcc.3c02091] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 06/24/2023] [Indexed: 08/10/2023]
Abstract
Ultrafast optical microscopy, generally employed by incorporating ultrafast laser pulses into microscopes, can provide spatially resolved mechanistic insight into scientific problems ranging from hot carrier dynamics to biological imaging. This Review discusses the progress in different ultrafast microscopy techniques, with a focus on transient absorption and two-dimensional microscopy. We review the underlying principles of these techniques and discuss their respective advantages and applicability to different scientific questions. We also examine in detail how instrument parameters such as sensitivity, laser power, and temporal and spatial resolution must be addressed. Finally, we comment on future developments and emerging opportunities in the field of ultrafast microscopy.
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Affiliation(s)
- Niklas Gross
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Christopher T. Kuhs
- Army
Research Laboratory-South, U.S. Army DEVCOM, Houston, Texas 77005, United States
| | - Behnaz Ostovar
- Department
of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States
| | - Wei-Yi Chiang
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Kelly S. Wilson
- Department
of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - Tanner S. Volek
- Department
of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - Zachary M. Faitz
- Department
of Chemistry, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Claire C. Carlin
- Department
of Materials Science and Engineering, Stanford
University, Stanford, California 94305, United States
| | - Jennifer A. Dionne
- Department
of Materials Science and Engineering, Stanford
University, Stanford, California 94305, United States
- Department
of Radiology, Molecular Imaging Program at Stanford (MIPS), Stanford University School of Medicine, Stanford, California 94305, United States
| | - Martin T. Zanni
- Department
of Chemistry, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Martin Gruebele
- Department
of Chemistry, University of Illinois at
Urbana−Champaign, Urbana, Illinois 61801, United States
- Department
of Physics, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
- Center
for Biophysics and Quantitative Biology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Sean T. Roberts
- Department
of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - Stephan Link
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
- Department
of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States
| | - Christy F. Landes
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
- Department
of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States
- Department
of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
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3
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Element- and enantiomer-selective visualization of molecular motion in real-time. Nat Commun 2023; 14:386. [PMID: 36693825 PMCID: PMC9873934 DOI: 10.1038/s41467-023-36047-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/13/2023] [Indexed: 01/25/2023] Open
Abstract
Ultrafast optical-domain spectroscopies allow to monitor in real time the motion of nuclei in molecules. Achieving element-selectivity had to await the advent of time resolved X-ray spectroscopy, which is now commonly carried at X-ray free electron lasers. However, detecting light element that are commonly encountered in organic molecules, remained elusive due to the need to work under vacuum. Here, we present an impulsive stimulated Raman scattering (ISRS) pump/carbon K-edge absorption probe investigation, which allowed observation of the low-frequency vibrational modes involving specific selected carbon atoms in the Ibuprofen RS dimer. Remarkably, by controlling the probe light polarization we can preferentially access the enantiomer of the dimer to which the carbon atoms belong.
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4
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Zheng D, Huang S, Zhu C, Li Z, Zhang Y, Yang D, Tian H, Li J, Yang H, Li J. Enhancement of lattice dynamics by an azimuthal surface plasmon on the femtosecond time scale in multi-walled carbon nanotubes. NANOSCALE 2022; 14:10477-10482. [PMID: 35822870 DOI: 10.1039/d2nr01272c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Plasmon-enhanced light-matter interactions have been widely investigated in the past decades. Here, we report surface plasmon-enhanced structural dynamics in multi-walled carbon nanotubes. The optical polarization dependent dynamic properties of multi-walled carbon nanotubes are investigated using ultrafast transmission electron microscopy. Lattice contractions in the femtosecond time regime are observed upon excitation of the azimuthal plasmon by light polarized perpendicular to the tubular axis. The polarization dependence of the plasmon near field was examined using photon-induced near-field electron microscopy. The lattice changes resulting from the azimuthal plasmon enhance ultrafast alterations in both localized evanescent fields and the collective charge excitation, which play critical roles governing the light-matter interaction. These results suggest that the ultrafast responses of lattice degrees of freedom in nanomaterials could be essential for understanding the mechanism of surface plasmon enhanced effects.
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Affiliation(s)
- Dingguo Zheng
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
- School of Physical Sciences, University of Chinese Academy of Science, Beijing, 100049, China
| | - Siyuan Huang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
- School of Physical Sciences, University of Chinese Academy of Science, Beijing, 100049, China
| | - Chunhui Zhu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Zhongwen Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Yongzhao Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
- School of Physical Sciences, University of Chinese Academy of Science, Beijing, 100049, China
| | - Dong Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Huanfang Tian
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Jun Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Huaixin Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
- School of Physical Sciences, University of Chinese Academy of Science, Beijing, 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Jianqi Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
- School of Physical Sciences, University of Chinese Academy of Science, Beijing, 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
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5
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Zheng D, Huang S, Zhu C, Xu P, Li Z, Wang H, Li J, Tian H, Yang H, Li J. Nanoscale Visualization of a Photoinduced Plasmonic Near-Field in a Single Nanowire by Free Electrons. NANO LETTERS 2021; 21:10238-10243. [PMID: 34860026 DOI: 10.1021/acs.nanolett.1c03203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Swift electrons can undergo inelastic interactions not only with electrons but also with near-fields, which may result in an energy loss or gain. Developments in photon-induced near-field electron microscopy (PINEM) enable direct imaging of the plasmon near-field distribution with nanometer resolution. Here, we report an analysis of the surface plasmonic near-field structure based on PINEM observations of silver nanowires. Single-photon order-selected electron images revealed the wavelike and banded structure of electric equipotential regions for a confined near-field integral associated with typical absorption of photon quanta (nℏω). Multimodal plasmon oscillations and second-harmonic generation were simultaneously observed, and the polarization dependence of plasmon wavelength and symmetry properties were analyzed. Based on advanced imaging techniques, our work has implications for future studies of the localized-field structures at interfaces and visualization of novel phenomena in nanostructures, nanosensors, and plasmonic devices.
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Affiliation(s)
- Dingguo Zheng
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Science, Beijing 100049, China
| | - Siyuan Huang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Science, Beijing 100049, China
| | - Chunhui Zhu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Peng Xu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zian Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Hong Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Science, Beijing 100049, China
| | - Jun Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Huanfang Tian
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Huaixin Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Science, Beijing 100049, China
- Yangtze River Delta Physics Research Center Co., Ltd., Liyang, Jiangsu 213300, China
| | - Jianqi Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Science, Beijing 100049, China
- Yangtze River Delta Physics Research Center Co., Ltd., Liyang, Jiangsu 213300, China
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6
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Chergui M. Launching Structural Dynamics. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2020; 7:060401. [PMID: 33415180 PMCID: PMC7771997 DOI: 10.1063/4.0000063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
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7
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Collette R, Garfinkel DA, Rack PD. Nearfield excited state imaging of bonding and antibonding plasmon modes in nanorod dimers via stimulated electron energy gain spectroscopy. J Chem Phys 2020; 153:044711. [PMID: 32752671 DOI: 10.1063/5.0012260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Stimulated electron energy loss and gain spectroscopy (sEELS and sEEGS) are used to image the nearfield of the bonding and antibonding localized surface plasmon resonance modes in nanorod dimers. A scanning transmission electron microscope equipped with an optical delivery system is used to simultaneously irradiate plasmonic nanorod dimers while electron energy loss and gain spectra of the active plasmons are collected. The length of the nanorod dimer is varied such that the bonding and antibonding modes are resonant with the laser energy. The optically bright bonding mode is clearly observed in the resonant sEEG spectrum images and, consistent with spontaneous EELS, no direct evidence of the hot spot is observed in sEEG. s-polarized irradiation does not stimulate the energy gain of the optically dark antibonding mode. However, when phase retardation is introduced by tilting the longitudinal axis, the otherwise dark antibonding mode becomes sEEG active.
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Affiliation(s)
- Robyn Collette
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - David A Garfinkel
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Philip D Rack
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
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8
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Collette R, Garfinkel DA, Hu Z, Masiello DJ, Rack PD. Near field excited state imaging via stimulated electron energy gain spectroscopy of localized surface plasmon resonances in plasmonic nanorod antennas. Sci Rep 2020; 10:12537. [PMID: 32719406 PMCID: PMC7385139 DOI: 10.1038/s41598-020-69066-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 07/06/2020] [Indexed: 11/09/2022] Open
Abstract
Continuous wave (cw) photon stimulated electron energy loss and gain spectroscopy (sEELS and sEEGS) is used to image the near field of optically stimulated localized surface plasmon resonance (LSPR) modes in nanorod antennas. An optical delivery system equipped with a nanomanipulator and a fiber-coupled laser diode is used to simultaneously irradiate plasmonic nanostructures in a (scanning) transmission electron microscope. The nanorod length is varied such that the m = 1, 2, and 3 LSPR modes are resonant with the laser energy and the optically stimulated near field spectra and images of these modes are measured. Various nanorod orientations are also investigated to explore retardation effects. Optical and electron beam simulations are used to rationalize the observed patterns. As expected, the odd modes are optically bright and result in observed sEEG responses. The m = 2 dark mode does not produce a sEEG response, however, when tilted such that retardation effects are operative, the sEEG signal emerges. Thus, we demonstrate that cw sEEGS is an effective tool in imaging the near field of the full set of nanorod plasmon modes of either parity.
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Affiliation(s)
- Robyn Collette
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - David A Garfinkel
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Zhongwei Hu
- Department of Chemistry, University of Washington, Seattle, WA, 98195, USA
| | - David J Masiello
- Department of Chemistry, University of Washington, Seattle, WA, 98195, USA
| | - Philip D Rack
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA.
- Center for Nanophase Materials Science, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
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9
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Alismail A, Wang H, Barbiero G, Altwaijry N, Hussain SA, Pervak V, Schweinberger W, Azzeer AM, Krausz F, Fattahi H. Multi-octave, CEP-stable source for high-energy field synthesis. SCIENCE ADVANCES 2020; 6:eaax3408. [PMID: 32110723 PMCID: PMC7021495 DOI: 10.1126/sciadv.aax3408] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 11/26/2019] [Indexed: 05/25/2023]
Abstract
The development of high-energy, high-power, multi-octave light transients is currently the subject of intense research driven by emerging applications in attosecond spectroscopy and coherent control. We report on a phase-stable, multi-octave source based on a Yb:YAG amplifier for light transient generation. We demonstrate the amplification of a two-octave spectrum to 25 μJ of energy in two broadband amplification channels and their temporal compression to 6 and 18 fs at 1 and 2 μm, respectively. In this scheme, due to the intrinsic temporal synchronization between the pump and seed pulses, the temporal jitter is restricted to long-term drift. We show that the intrinsic stability of the synthesizer allows subcycle detection of an electric field at 0.15 PHz. The complex electric field of the 0.15-PHz pulses and their free induction decay after interaction with water molecules are resolved by electro-optic sampling over 2 ps. The scheme is scalable in peak and average power.
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Affiliation(s)
- Ayman Alismail
- Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany
- Physics and Astronomy Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Haochuan Wang
- Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany
- Max Planck Institute of Quantum Optics, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
| | - Gaia Barbiero
- Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany
- Max Planck Institute of Quantum Optics, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
| | - Najd Altwaijry
- Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany
- Max Planck Institute of Quantum Optics, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
| | - Syed Ali Hussain
- Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany
- Max Planck Institute of Quantum Optics, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
| | - Volodymyr Pervak
- Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany
| | - Wolfgang Schweinberger
- Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany
| | - Abdallah M. Azzeer
- Physics and Astronomy Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ferenc Krausz
- Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany
- Max Planck Institute of Quantum Optics, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
| | - Hanieh Fattahi
- Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany
- Max Planck Institute of Quantum Optics, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
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10
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Zhu T, Snaider JM, Yuan L, Huang L. Ultrafast Dynamic Microscopy of Carrier and Exciton Transport. Annu Rev Phys Chem 2019; 70:219-244. [PMID: 30883273 DOI: 10.1146/annurev-physchem-042018-052605] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We highlight the recent progress in ultrafast dynamic microscopy that combines ultrafast optical spectroscopy with microscopy approaches, focusing on the application transient absorption microscopy (TAM) to directly image energy and charge transport in solar energy harvesting and conversion systems. We discuss the principles, instrumentation, and resolutions of TAM. The simultaneous spatial, temporal, and excited-state-specific resolutions of TAM unraveled exciton and charge transport mechanisms that were previously obscured in conventional ultrafast spectroscopy measurements for systems such as organic solar cells, hybrid perovskite thin films, and molecular aggregates. We also discuss future directions to improve resolutions and to develop other ultrafast imaging contrasts beyond transient absorption.
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Affiliation(s)
- Tong Zhu
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
- Laser/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Jordan M. Snaider
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
| | - Long Yuan
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
| | - Libai Huang
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
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11
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Etman N, Said AMA, Atia KSR, Sultan R, Hameed MFO, Amin M, Obayya SSA. Quantum Effects In Imaging Nano-Structures Using Photon-Induced Near-Field Electron Microscopy. Sci Rep 2019; 9:6139. [PMID: 30992492 PMCID: PMC6468085 DOI: 10.1038/s41598-019-42624-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 04/02/2019] [Indexed: 11/20/2022] Open
Abstract
In this paper, we introduce the quantum mechanical approach as a more physically-realistic model to accurately quantify the electron-photon interaction in Photon-induced near-field electron microscopy (PINEM). Further, we compare the maximum coupling speed between the electrons and the photons in the quantum and classical regime. For a nanosphere of radius 2.13 nm, full quantum calculations show that the maximum coupling between photon and electron occurs at a slower speed than classical calculations report. In addition, a significant reduction in PINEM field intensity is observed for the full quantum model. Furthermore, we discuss the size limitation for particles imaged using the PIMEN technique and the role of the background material in improving the PINEM intensity. We further report a significant reduction in PINEM intensity in nearly touching plasmonic particles (0.3 nm gap) due to tunneling effect.
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Affiliation(s)
- Naglaa Etman
- Center for Photonics and Smart Materials, Zewail City of Science and Technology, October Gardens, Giza, 12578, Egypt.,Electronics and Communications Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, 35516, Egypt
| | - Afaf M A Said
- Center for Photonics and Smart Materials, Zewail City of Science and Technology, October Gardens, Giza, 12578, Egypt
| | - Khaled S R Atia
- Center for Photonics and Smart Materials, Zewail City of Science and Technology, October Gardens, Giza, 12578, Egypt.,Advanced Research Complex, University of Ottawa, Ottawa, ON, K1N 6N5, Canada
| | - Reem Sultan
- Electronics and Communications Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, 35516, Egypt
| | - Mohamed Farhat O Hameed
- Center for Photonics and Smart Materials, Zewail City of Science and Technology, October Gardens, Giza, 12578, Egypt. .,Nanotechnolgy Engineering Program, University of Science and Technology, Zewail City of Science and Technology, October Gardens, Giza, 12578, Egypt. .,Mathematics and Engineering Physics Dept., Faculty of Engineering, Mansoura University, Mansoura, 35516, Egypt.
| | - Muhamed Amin
- Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607, Hamburg, Germany. .,Department of Sciences, University College Groningen, Hoendiepskade 23/24, 9718, BG Groningen, Netherlands.
| | - S S A Obayya
- Center for Photonics and Smart Materials, Zewail City of Science and Technology, October Gardens, Giza, 12578, Egypt. .,Electronics and Communications Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, 35516, Egypt.
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12
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Xu X, Isik T, Kundu S, Ortalan V. Investigation of laser-induced inter-welding between Au and Ag nanoparticles and the plasmonic properties of welded dimers. NANOSCALE 2018; 10:23050-23058. [PMID: 30511072 DOI: 10.1039/c8nr07718e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Noble metallic nanoparticles with unique plasmonic properties are useful in a variety of applications including bio-imaging, sensing, cancer therapy, etc. The properties of metallic nanoparticles can be tuned in multiple ways, among which laser welding is a highly efficient method. In this study, laser-induced inter-welding of Ag-Au nanoparticle (NP) dimers was investigated using in situ transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDX). For the first time, the welding process was directly visualized. The structural and compositional evolution of Ag-Au dimers was studied in detail, and several typical nanostructures formed during the welding process, including two types of core-shell structures, were discovered. Based on these observations, we proposed a complete mechanism explaining how welding proceeds under the influence of a laser. Finite difference time domain (FDTD) simulations demonstrated that the plasmonic properties of welded Ag-Au dimers were different from those of pure Au-Au or Ag-Ag dimers and can be tuned by forming shells, alloying or changing the size ratio of Ag and Au NPs.
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Affiliation(s)
- Xiaohui Xu
- School of Materials Engineering, Purdue University, 701 West Stadium Avenue, West Lafayette, Indiana 47907, USA
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13
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Wu Y, Liu C, Moore TM, Magel GA, Garfinkel DA, Camden JP, Stanford MG, Duscher G, Rack PD. Exploring Photothermal Pathways via in Situ Laser Heating in the Transmission Electron Microscope: Recrystallization, Grain Growth, Phase Separation, and Dewetting in Ag0.5Ni0.5 Thin Films. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2018; 24:647-656. [PMID: 30588914 DOI: 10.1017/s1431927618015465] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A new optical delivery system has been developed for the (scanning) transmission electron microscope. Here we describe the in situ and "rapid ex situ" photothermal heating modality of the system, which delivers >200 mW of optical power from a fiber-coupled laser diode to a 3.7 μm radius spot on the sample. Selected thermal pathways can be accessed via judicious choices of the laser power, pulse width, number of pulses, and radial position. The long optical working distance mitigates any charging artifacts and tremendous thermal stability is observed in both pulsed and continuous wave conditions, notably, no drift correction is applied in any experiment. To demonstrate the optical delivery system's capability, we explore the recrystallization, grain growth, phase separation, and solid state dewetting of a Ag0.5Ni0.5 film. Finally, we demonstrate that the structural and chemical aspects of the resulting dewetted films was assessed.
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Affiliation(s)
- Yueying Wu
- 1Department of Chemistry and Biochemistry,University of Notre Dame,Notre Dame,IN46556,USA
| | - Chenze Liu
- 2Department of Materials Science and Engineering,University of Tennessee,Knoxville,TN 37996,USA
| | | | | | - David A Garfinkel
- 2Department of Materials Science and Engineering,University of Tennessee,Knoxville,TN 37996,USA
| | - Jon P Camden
- 1Department of Chemistry and Biochemistry,University of Notre Dame,Notre Dame,IN46556,USA
| | - Michael G Stanford
- 2Department of Materials Science and Engineering,University of Tennessee,Knoxville,TN 37996,USA
| | - Gerd Duscher
- 2Department of Materials Science and Engineering,University of Tennessee,Knoxville,TN 37996,USA
| | - Philip D Rack
- 2Department of Materials Science and Engineering,University of Tennessee,Knoxville,TN 37996,USA
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14
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Abela R, Beaud P, van Bokhoven JA, Chergui M, Feurer T, Haase J, Ingold G, Johnson SL, Knopp G, Lemke H, Milne CJ, Pedrini B, Radi P, Schertler G, Standfuss J, Staub U, Patthey L. Perspective: Opportunities for ultrafast science at SwissFEL. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2017; 4:061602. [PMID: 29376109 PMCID: PMC5758366 DOI: 10.1063/1.4997222] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 10/17/2017] [Indexed: 05/03/2023]
Abstract
We present the main specifications of the newly constructed Swiss Free Electron Laser, SwissFEL, and explore its potential impact on ultrafast science. In light of recent achievements at current X-ray free electron lasers, we discuss the potential territory for new scientific breakthroughs offered by SwissFEL in Chemistry, Biology, and Materials Science, as well as nonlinear X-ray science.
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Affiliation(s)
- Rafael Abela
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Paul Beaud
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Jeroen A van Bokhoven
- Laboratory for Catalysis and Sustainable Chemistry, Paul-Scherrer Institute, 5232 Villigen PSI, and Department of Chemistry, ETH-Zürich, 8093 Zürich, Switzerland
| | - Majed Chergui
- Laboratoire de Spectroscopie Ultrarapide (LSU) and Lausanne Centre for Ultrafast Science (LACUS), Ecole Polytechnique Fédérale de Lausanne (EPFL), ISIC-FSB, Station 6, 1015 Lausanne, Switzerland
| | - Thomas Feurer
- Institute of Applied Physics, University of Bern, Bern, Switzerland
| | - Johannes Haase
- Laboratory for Catalysis and Sustainable Chemistry, Paul-Scherrer Institute, 5232 Villigen PSI, and Department of Chemistry, ETH-Zürich, 8093 Zürich, Switzerland
| | - Gerhard Ingold
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Steven L Johnson
- Institute for Quantum Electronics, Eidgenössische Technische Hochschule (ETH) Zürich, 8093 Zurich, Switzerland
| | - Gregor Knopp
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Henrik Lemke
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Chris J Milne
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Bill Pedrini
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Peter Radi
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
| | | | - Jörg Standfuss
- Division of Biology and Chemistry, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Urs Staub
- Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Luc Patthey
- SwissFEL, Paul-Scherrer Institute, 5232 Villigen PSI, Switzerland
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15
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Hamm P, Meuwly M, Johnson SL, Beaud P, Staub U. Perspective: THz-driven nuclear dynamics from solids to molecules. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2017; 4:061601. [PMID: 29308420 PMCID: PMC5741436 DOI: 10.1063/1.4992050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 11/14/2017] [Indexed: 06/07/2023]
Abstract
Recent years have seen dramatic developments in the technology of intense pulsed light sources in the THz frequency range. Since many dipole-active excitations in solids and molecules also lie in this range, there is now a tremendous potential to use these light sources to study linear and nonlinear dynamics in such systems. While several experimental investigations of THz-driven dynamics in solid-state systems have demonstrated a variety of interesting linear and nonlinear phenomena, comparatively few efforts have been made to drive analogous dynamics in molecular systems. In the present Perspective article, we discuss the similarities and differences between THz-driven dynamics in solid-state and molecular systems on both conceptual and practical levels. We also discuss the experimental parameters needed for these types of experiments and thereby provide design criteria for a further development of this new research branch. Finally, we present a few recent examples to illustrate the rich physics that may be learned from nonlinear THz excitations of phonons in solids as well as inter-molecular vibrations in liquid and gas-phase systems.
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Affiliation(s)
- Peter Hamm
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Markus Meuwly
- Department of Chemistry, University of Basel, Basel, Switzerland
| | - Steve L Johnson
- Institute for Quantum Electronics, ETH Zurich, Zurich, Switzerland
| | - Paul Beaud
- Paul Scherrer Institute, Villigen, Switzerland
| | - Urs Staub
- Paul Scherrer Institute, Villigen, Switzerland
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16
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17
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Yuan KJ, Chelkowski S, Bandrauk AD. Ultrafast molecular photoionization by two-color orthogonally polarized ultraviolet laser pulses: Effects of relative pulse phases. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.02.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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18
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Chergui M, Collet E. Photoinduced Structural Dynamics of Molecular Systems Mapped by Time-Resolved X-ray Methods. Chem Rev 2017; 117:11025-11065. [DOI: 10.1021/acs.chemrev.6b00831] [Citation(s) in RCA: 150] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Majed Chergui
- Laboratoire
de Spectroscopie Ultrarapide (LSU), ISIC, and Lausanne Centre for
Ultrafast Science (LACUS), Faculté des Sciences de Base, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
| | - Eric Collet
- Univ Rennes 1, CNRS, Institut de Physique de Rennes, UMR 6251, UBL, Rennes F-35042, France
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19
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Chergui M, Thomas JM. From structure to structural dynamics: Ahmed Zewail's legacy. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2017; 4:043802. [PMID: 28868324 PMCID: PMC5562505 DOI: 10.1063/1.4998243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 08/08/2017] [Indexed: 05/19/2023]
Abstract
In this brief tribute to Ahmed Zewail, we highlight and place in the historical context, several of the major achievements that he and his colleagues have made in Femtochemistry (of which he was the principal instigator) and his introduction of ultrafast electron scattering, diffraction, microscopy and spectroscopy. By achieving a sub-picosecond temporal resolution, coupled with a picometer spatial resolution, he revolutionised our understanding of the corpus of chemical, physical, biological and materials science systems.
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Affiliation(s)
- Majed Chergui
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide and Lausanne Centre for Ultrafast Science (LACUS), ISIC, Faculté des Sciences de Base, Station 6, CH-1015 Lausanne, Switzerland
| | - John Meurig Thomas
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB30FS, United Kingdom
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20
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Shaheen BS, Sun J, Yang DS, Mohammed OF. Spatiotemporal Observation of Electron-Impact Dynamics in Photovoltaic Materials Using 4D Electron Microscopy. J Phys Chem Lett 2017; 8:2455-2462. [PMID: 28514160 DOI: 10.1021/acs.jpclett.7b01116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Understanding light-triggered charge carrier dynamics near photovoltaic-material surfaces and at interfaces has been a key element and one of the major challenges for the development of real-world energy devices. Visualization of such dynamics information can be obtained using the one-of-a-kind methodology of scanning ultrafast electron microscopy (S-UEM). Here, we address the fundamental issue of how the thickness of the absorber layer may significantly affect the charge carrier dynamics on material surfaces. Time-resolved snapshots indicate that the dynamics of charge carriers generated by electron impact in the electron-photon dynamical probing regime is highly sensitive to the thickness of the absorber layer, as demonstrated using CdSe films of different thicknesses as a model system. This finding not only provides the foundation for potential applications of S-UEM to a wide range of devices in the fields of chemical and materials research, but also has impact on the use and interpretation of electron beam-induced current for optimization of photoactive materials in these devices.
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Affiliation(s)
- Basamat S Shaheen
- KAUST Solar Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
| | - Jingya Sun
- KAUST Solar Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
| | - Ding-Shyue Yang
- Department of Chemistry, University of Houston , Houston, Texas 77204, United States
| | - Omar F Mohammed
- KAUST Solar Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
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21
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Yuan KJ, Shu CC, Dong D, Bandrauk AD. Attosecond Dynamics of Molecular Electronic Ring Currents. J Phys Chem Lett 2017; 8:2229-2235. [PMID: 28468499 DOI: 10.1021/acs.jpclett.7b00877] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Ultrafast charge migration is of fundamental importance to photoinduced chemical reactions. However, exploring such a quantum dynamical process requires demanding spatial and temporal resolutions. We show how electronic coherence dynamics induced in molecules by a circularly polarized UV pulse can be tracked by using a time-delayed circularly polarized attosecond X-ray pulse. The X-ray probe spectra retrieve an image at different time delays, encoding instantaneous pump-induced circular charge migration information on an attosecond time scale. A time-dependent ultrafast electronic coherence associated with the periodical circular ring currents shows a strong dependence on the helicity of the UV pulse, which may provide a direct approach to access and control the electronic quantum coherence dynamics in photophysical and photochemical reactions in real time.
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Affiliation(s)
- Kai-Jun Yuan
- Département de Chimie, Faculté des Sciences, Université de Sherbrooke , Sherbrooke, Québec J1K 2R1, Canada
| | - Chuan-Cun Shu
- School of Engineering and Information Technology, University of New South Wales , Canberra, Australian Capital Territory 2600, Australia
| | - Daoyi Dong
- School of Engineering and Information Technology, University of New South Wales , Canberra, Australian Capital Territory 2600, Australia
| | - André D Bandrauk
- Département de Chimie, Faculté des Sciences, Université de Sherbrooke , Sherbrooke, Québec J1K 2R1, Canada
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22
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Howie A. New instrumentation and cutting edge research. Ultramicroscopy 2017; 180:52-58. [PMID: 28258870 DOI: 10.1016/j.ultramic.2016.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 11/04/2016] [Accepted: 11/15/2016] [Indexed: 11/16/2022]
Abstract
Stimulated by Ondrej Krivanek's contributions, the complex interaction between research and innovations in the instrumentation for electron microscopy is discussed. Specific attention is given to aberration correction and to spectroscopy in both the valence region and at the energies of localised phonons or bond vibrations. Current thinking about projection imaging and dielectric excitation theory may be challenged. More significantly in the new fields of investigation opened up to them, electron microscopists will need to build closer relations, particularly with the photonics and scanning tunnelling microscopy communities. Further improvements in instrumentation could usefully be directed towards imaging and spectroscopy at higher scattering angles as well as the incorporation of other facilities such as photon stimulation and secondary electron imaging.
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Affiliation(s)
- A Howie
- Dept. of Physics, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, UK
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Adhikari A, Eliason JK, Sun J, Bose R, Flannigan DJ, Mohammed OF. Four-Dimensional Ultrafast Electron Microscopy: Insights into an Emerging Technique. ACS APPLIED MATERIALS & INTERFACES 2017; 9:3-16. [PMID: 27976852 DOI: 10.1021/acsami.6b12301] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Four-dimensional ultrafast electron microscopy (4D-UEM) is a novel analytical technique that aims to fulfill the long-held dream of researchers to investigate materials at extremely short spatial and temporal resolutions by integrating the excellent spatial resolution of electron microscopes with the temporal resolution of ultrafast femtosecond laser-based spectroscopy. The ingenious use of pulsed photoelectrons to probe surfaces and volumes of materials enables time-resolved snapshots of the dynamics to be captured in a way hitherto impossible by other conventional techniques. The flexibility of 4D-UEM lies in the fact that it can be used in both the scanning (S-UEM) and transmission (UEM) modes depending upon the type of electron microscope involved. While UEM can be employed to monitor elementary structural changes and phase transitions in samples using real-space mapping, diffraction, electron energy-loss spectroscopy, and tomography, S-UEM is well suited to map ultrafast dynamical events on materials surfaces in space and time. This review provides an overview of the unique features that distinguish these techniques and also illustrates the applications of both S-UEM and UEM to a multitude of problems relevant to materials science and chemistry.
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Affiliation(s)
- Aniruddha Adhikari
- King Abdullah University of Science and Technology , KAUST Solar Center, Division of Physical Sciences and Engineering, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jeffrey K Eliason
- Department of Chemical Engineering and Materials Science, University of Minnesota , 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Jingya Sun
- King Abdullah University of Science and Technology , KAUST Solar Center, Division of Physical Sciences and Engineering, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Riya Bose
- King Abdullah University of Science and Technology , KAUST Solar Center, Division of Physical Sciences and Engineering, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - David J Flannigan
- Department of Chemical Engineering and Materials Science, University of Minnesota , 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Omar F Mohammed
- King Abdullah University of Science and Technology , KAUST Solar Center, Division of Physical Sciences and Engineering, Thuwal 23955-6900, Kingdom of Saudi Arabia
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24
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Yuan KJ, Bandrauk AD. Monitoring coherent electron wave packet excitation dynamics by two-color attosecond laser pulses. J Chem Phys 2016; 145:194304. [DOI: 10.1063/1.4968230] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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25
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Kemp T. Ahmed Zewail: 26 February 1946 – 2 August 2016. PROGRESS IN REACTION KINETICS AND MECHANISM 2016. [DOI: 10.3184/146867816x14720347838213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Affiliation(s)
- Hans-Beat Bürgi
- Department of Chemistry and Biochemistry; University of Berne; Freiestr. 3 3012 Bern Switzerland
- Department of Chemistry; University of Zürich; Winterthurerstr. 190 8057 Zürich Switzerland
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Fattahi H, Wang H, Alismail A, Arisholm G, Pervak V, Azzeer AM, Krausz F. Near-PHz-bandwidth, phase-stable continua generated from a Yb:YAG thin-disk amplifier. OPTICS EXPRESS 2016; 24:24337-24346. [PMID: 27828164 DOI: 10.1364/oe.24.024337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report on the generation of a multi-octave, phase-stable continuum from the output of a Yb:YAG regenerative amplifier delivering 1-ps pulses with randomly varying carrier-envelope phase (CEP). The intrinsically CEP-stable spectral continuum spans from 450 nm to beyond 2500 nm, covering a spectral range of about 0.6 PHz. The generated coherent broadband light carries an energy of 4 μJ, which can be scaled to higher values if required. The system has been designed and is ideally suited for seeding broadband parametric amplifiers and multichannel synthesizers pumped by picosecond Yb:YAG amplifiers, obviating the need for active timing synchronization required in previous approaches. The presented concept paves the way to cost-effective, reliable all-Yb:YAG single-cycle sources with terawatt peak-power and tens-of-Watts average power.
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Meurig Thomas J. Developments in Structural Chemistry from the Viewpoint of a Solid-state Chemist: A Review Prompted by the Sixtieth Anniversary of Professor Jack Dunitz's Research Group in the ETH, Zurich. Isr J Chem 2016. [DOI: 10.1002/ijch.201600053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- John Meurig Thomas
- Department of Materials Science and Metallurgy; University of Cambridge; 27 Charles Babbage Road Cambridge CB3 0FS UK
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