1
|
Tateda M, Iida Y, Miyaji G. Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses. Sci Rep 2023; 13:18414. [PMID: 37891205 PMCID: PMC10611748 DOI: 10.1038/s41598-023-45968-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 10/26/2023] [Indexed: 10/29/2023] Open
Abstract
Using a pump-probe technique, the reflectivity of a silicon grating surface irradiated with intense femtosecond (fs) laser pulses was measured as a function of the incidence angle and the delay time between pulses. After irradiating the surface with an intense s-polarized, 400 nm, 300 fs laser pulse, the reflectivity measured with a weak p-polarized, 800 nm, 100 fs laser pulse exhibited an abrupt decrease for an incidence angle of ~ 24°. The depth of the dip was greatest for a delay time of 0.6-10 ps, for which the reflectivity around the dip was highest. The surface was also found to be ablated most strongly for the conditions causing the deepest dip for a delay time of 5-10 ps. Surface plasmon polaritons (SPPs) on silicon metallized by the intense pulse are resonantly excited by the subsequent pulse, and the strong coherent coupling between the subsequent pulse and SPPs excited on the molten Si surface produced by high-density free electrons induces strong surface ablation due to the intense plasmonic near-field. The results clearly show that fs pulses can be used to significantly modulate the nature of nonmetallic materials and could possibly serve as a basic tool for the excitation of SPPs on nonmetallic materials using ultrafast laser-matter interactions.
Collapse
Affiliation(s)
- Mika Tateda
- Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo, 184-8588, Japan
| | - Yuto Iida
- Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo, 184-8588, Japan.
| | - Godai Miyaji
- Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo, 184-8588, Japan.
| |
Collapse
|
2
|
Xie X, Cavalieri AL, Johnson SL. Self-compression of femtosecond laser pulses in ambient air through conical radiation. OPTICS LETTERS 2023; 48:5101-5104. [PMID: 37773395 DOI: 10.1364/ol.501319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 09/05/2023] [Indexed: 10/01/2023]
Abstract
We demonstrate self-compression of 98 fs near-infrared laser pulses down to 8.8 fs in ambient air, utilizing self-phase modulation in air and negative dispersion in the properties of a laser-induced plasma. The blueshifted pulses achieve self-compression through conical radiation, eliminating the need for additional dispersion compensation. The results highlight a simple and compact approach to generate sub-10 fs laser pulses without additional measures for time-resolved applications in ultrafast diagnostics and spectroscopy.
Collapse
|
3
|
Hanus V, Kangaparambil S, Richter M, Haßfurth L, Dorner-Kirchner M, Paulus GG, Xie X, Baltuška A, Gräfe S, Zeiler M. Carrier envelope phase sensitivity of photoelectron circular dichroism. Phys Chem Chem Phys 2023; 25:4656-4666. [PMID: 36722912 PMCID: PMC9906976 DOI: 10.1039/d2cp03077b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We report on a combined experimental and numerical study of photoelectron circular dichroism (PECD) induced by intense few-cycle laser pulses, using methyloxirane as the molecular example. Our experiments reveal a remarkably pronounced sensitivity of the PECD strength of double-ionization on the carrier-envelope phase (CEP) of the laser pulses. By comparison to the simulations, which reproduce the measured CEP-dependence for specific orientations of the molecules in the lab frame, we attribute the origin of the observed CEP-dependence of PECD to the CEP-induced modulation of ionization from different areas of the wave functions of three dominant orbitals.
Collapse
Affiliation(s)
- Václav Hanus
- Photonics Institute, Technische Universität Wien, 1040 Vienna, Austria. .,Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, 1121 Budapest, Hungary
| | | | - Martin Richter
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany. .,Fraunhofer Institute for Applied Optics and Precision Engineering, 07745 Jena, Germany
| | - Lukas Haßfurth
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany. .,Fraunhofer Institute for Applied Optics and Precision Engineering, 07745 Jena, Germany
| | | | - Gerhard G. Paulus
- Institute for Optics and Quantum Electronics, Friedrich-Schiller-Universität Jena07743 JenaGermany
| | - Xinhua Xie
- Photonics Institute, Technische Universität Wien, 1040 Vienna, Austria. .,SwissFEL, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Andrius Baltuška
- Photonics Institute, Technische Universität Wien, 1040 Vienna, Austria.
| | - Stefanie Gräfe
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany. .,Fraunhofer Institute for Applied Optics and Precision Engineering, 07745 Jena, Germany
| | - Markus Zeiler
- Photonics Institute, Technische Universität Wien, 1040 Vienna, Austria.
| |
Collapse
|
4
|
Bittner DM, Gope K, Strasser D. Time-resolved dissociative ionization and double photoionization of CO 2. J Chem Phys 2020; 153:194201. [PMID: 33218224 DOI: 10.1063/5.0028812] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
CO2 single-photon double photoionization, Coulomb explosion, and dissociative ionization are studied with ultrafast extreme-ultraviolet pump and time-delayed near-infrared probe pulses. Kinetic energy release and momentum correlations for the two-body CO+ + O+ and three-body O+ + C+ + O fragmentation products are determined by 3D coincidence fragment imaging. The transient enhancement of the ratio of two-body vs three-body Coulomb explosion events and the time dependence of low and high kinetic energy release dissociation events are discussed in terms of dissociative ionization and Coulomb explosion dynamics.
Collapse
Affiliation(s)
- Dror M Bittner
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Krishnendu Gope
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Daniel Strasser
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| |
Collapse
|
5
|
Ampadu Boateng D, Tibbetts KM. Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization. J Vis Exp 2018. [PMID: 30124651 DOI: 10.3791/58263] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
We present a pump-probe method for preparing vibrational coherences in polyatomic radical cations and probing their ultrafast dynamics. By shifting the wavelength of the strong-field ionizing pump pulse from the commonly used 800 nm into the near-infrared (1200-1600 nm), the contribution of adiabatic electron tunneling to the ionization process increases relative to multiphoton absorption. Adiabatic ionization results in predominant population of the ground electronic state of the ion upon electron removal, which effectively prepares a coherent vibrational state ("wave packet") amenable to subsequent excitation. In our experiments, the coherent vibrational dynamics are probed with a weak-field 800 nm pulse and the time-dependent yields of dissociation products measured in a time-of-flight mass spectrometer. We present the measurements on the molecule dimethyl methylphosphonate (DMMP) to illustrate how using 1500 nm pulses for excitation enhances the amplitude of coherent oscillations in ion yields by a factor of 10 as compared to 800 nm pulses. This protocol may be implemented in existing pump-probe setups through the incorporation of an optical parametric amplifier (OPA) for wavelength conversion.
Collapse
|
6
|
Britton M, Laferrière P, Ko DH, Li Z, Kong F, Brown G, Naumov A, Zhang C, Arissian L, Corkum PB. Testing the Role of Recollision in N_{2}^{+} Air Lasing. PHYSICAL REVIEW LETTERS 2018; 120:133208. [PMID: 29694197 DOI: 10.1103/physrevlett.120.133208] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 01/20/2018] [Indexed: 06/08/2023]
Abstract
It has been known for many years that during filamentation of femtosecond light pulses in air, gain is observed on the B to X transition in N_{2}^{+}. While the gain mechanism remains unclear, it has been proposed that recollision, a process that is fundamental to much of strong field science, is critical for establishing gain. We probe this hypothesis by directly comparing the influence of the ellipticity of the pump light on gain in air filaments. Then, we decouple filamentation from gain by measuring the gain in a thin gas jet that we also use for high harmonic generation. The latter allows us to compare the dependence of the gain on the ellipticity of the pump with the dependence of the high harmonic signal on the ellipticity of the fundamental. We find that gain and harmonic generation have very different behavior in both filaments and in the jet. In fact, in a jet we even measure gain with circular polarization. Thus, we establish that recollision does not play a significant role in creating the inversion.
Collapse
Affiliation(s)
| | | | - Dong Hyuk Ko
- University of Ottawa, Ottawa K1N 6N5, Ontario, Canada
| | - Zhengyan Li
- University of Ottawa, Ottawa K1N 6N5, Ontario, Canada
| | - Fanqi Kong
- University of Ottawa, Ottawa K1N 6N5, Ontario, Canada
| | - Graham Brown
- University of Ottawa, Ottawa K1N 6N5, Ontario, Canada
| | - Andrei Naumov
- National Research Council of Canada, Ottawa K1A 0R6, Ontario, Canada
| | - Chunmei Zhang
- University of Ottawa, Ottawa K1N 6N5, Ontario, Canada
| | - Ladan Arissian
- University of Ottawa, Ottawa K1N 6N5, Ontario, Canada
- National Research Council of Canada, Ottawa K1A 0R6, Ontario, Canada
- University of New Mexico, Albuquerque 87131, New Mexico, USA
| | - P B Corkum
- University of Ottawa, Ottawa K1N 6N5, Ontario, Canada
- National Research Council of Canada, Ottawa K1A 0R6, Ontario, Canada
| |
Collapse
|
7
|
Ampadu Boateng D, Gutsev GL, Jena P, Tibbetts KM. Ultrafast coherent vibrational dynamics in dimethyl methylphosphonate radical cation. Phys Chem Chem Phys 2018; 20:4636-4640. [DOI: 10.1039/c7cp07261a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coherent vibrational dynamics drive dissociation of dimethyl methylphosphonate (DMMP) radical cation.
Collapse
Affiliation(s)
| | | | - Puru Jena
- Department of Physics
- Virginia Commonwealth University
- Richmond
- USA
| | | |
Collapse
|
8
|
Li N, Zhou Y, Ma X, Li M, Huang C, Lu P. Correlated electron dynamics in strong-field nonsequential double ionization of Mg. J Chem Phys 2017; 147:174302. [PMID: 29117686 DOI: 10.1063/1.5001668] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Using the classical ensemble model, we systematically investigate strong-field nonsequential double ionization (NSDI) of Mg by intense elliptically polarized laser pulses with different wavelengths. Different from the noble atoms, NSDI occurs for Mg driven by elliptically and circularly polarized laser fields. Our results show that in elliptically and circularly polarized laser fields, the NSDI yield is sharply suppressed as the wavelength increases. Interestingly, the correlated behavior in the electron momentum spectra depends sensitively on the wavelengths. The corresponding electron dynamics is revealed by back tracing the classical trajectory.
Collapse
Affiliation(s)
- Ning Li
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yueming Zhou
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xiaomeng Ma
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Min Li
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Cheng Huang
- School of Physical Science and Technology, Southwest University, Chongqing 400715, China
| | - Peixiang Lu
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| |
Collapse
|
9
|
Rudenko A, Makhija V, Vajdi A, Ergler T, Schürholz M, Kushawaha RK, Ullrich J, Moshammer R, Kumarappan V. Strong-field-induced wave packet dynamics in carbon dioxide molecule. Faraday Discuss 2016; 194:463-478. [PMID: 27711853 DOI: 10.1039/c6fd00152a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Temporal evolution of electronic and nuclear wave packets created in strong-field excitation of the carbon dioxide molecule is studied employing momentum-resolved ion spectroscopy and channel-selective Fourier analysis. Combining the data obtained with two different pump-probe set-ups, we observed signatures of vibrational dynamics in both, ionic and neutral states of the molecule. We consider far-off-resonance two-photon Raman scattering to be the most likely mechanism of vibrational excitation in the electronic ground state of the neutral CO2. Using the measured phase relation between the time-dependent yields of different fragmentation channels, which is consistent with the proposed mechanism, we suggest an intuitive picture of the underlying vibrational dynamics. For ionic states, we found signatures of both, electronic and vibrational excitations, which involve the ground and the first excited electronic states, depending on the particular final state of the fragmentation. While our results for ionic states are consistent with the recent observations by Erattupuzha et al. [J. Chem. Phys.144, 024306 (2016)], the neutral state contribution was not observed there, which we attribute to a larger bandwidth of the 8 fs pulses we used for this experiment. In a complementary measurement employing longer, 35 fs pulses in a 30 ps delay range, we study the influence of rotational excitation on our observables, and demonstrate how the coherent electronic wave packet created in the ground electronic state of the ion completely decays within 10 ps due to the coupling to rotational motion.
Collapse
Affiliation(s)
- Artem Rudenko
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA. and Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - Varun Makhija
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA. and Department of Physics, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Aram Vajdi
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA. and Department of Electrical and Computer Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - Thorsten Ergler
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | | | - Rajesh K Kushawaha
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA.
| | - Joachim Ullrich
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany and Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
| | | | - Vinod Kumarappan
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA.
| |
Collapse
|