1
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Fushitani M, Fujise H, Hishikawa A, You D, Saito S, Luo Y, Ueda K, Ibrahim H, Légaré F, Pratt ST, Eng-Johnsson P, Mauritsson J, Olofsson A, Peschel J, Simpson ER, Carpeggiani PA, Ertel D, Maroju PK, Moioli M, Sansone G, Shah R, Csizmadia T, Dumergue M, Nandiga Gopalakrishna H, Kühn S, Callegari C, Danailov M, Demidovich A, Raimondi L, Zangrando M, De Ninno G, Di Fraia M, Giannessi L, Plekan O, Rebernik Ribic P, Prince KC. Wave packet dynamics and control in excited states of molecular nitrogen. J Chem Phys 2024; 160:104203. [PMID: 38469909 DOI: 10.1063/5.0188182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/16/2024] [Indexed: 03/13/2024] Open
Abstract
Wave packet interferometry with vacuum ultraviolet light has been used to probe a complex region of the electronic spectrum of molecular nitrogen, N2. Wave packets of Rydberg and valence states were excited by using double pulses of vacuum ultraviolet (VUV), free-electron-laser (FEL) light. These wave packets were composed of contributions from multiple electronic states with a moderate principal quantum number (n ∼ 4-9) and a range of vibrational and rotational quantum numbers. The phase relationship of the two FEL pulses varied in time, but as demonstrated previously, a shot-by-shot analysis allows the spectra to be sorted according to the phase between the two pulses. The wave packets were probed by angle-resolved photoionization using an infrared pulse with a variable delay after the pair of excitation pulses. The photoelectron branching fractions and angular distributions display oscillations that depend on both the time delays and the relative phases of the VUV pulses. The combination of frequency, time delay, and phase selection provides significant control over the ionization process and ultimately improves the ability to analyze and assign complex molecular spectra.
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Affiliation(s)
- Mizuho Fushitani
- Department of Chemistry, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
| | - Hikaru Fujise
- Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
| | - Akiyoshi Hishikawa
- Department of Chemistry, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
- Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
| | - Daehyun You
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi 980-8577, Japan
| | - Shu Saito
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi 980-8577, Japan
| | - Yu Luo
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi 980-8577, Japan
| | - Kiyoshi Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi 980-8577, Japan
| | - Heide Ibrahim
- INRS, Énergie, Matériaux et Télécommunications, 1650 Bld. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
| | - Francois Légaré
- INRS, Énergie, Matériaux et Télécommunications, 1650 Bld. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
| | - Stephen T Pratt
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | | | | | - Anna Olofsson
- Department of Physics, Lund University, Lund, Sweden
| | | | | | | | - Dominik Ertel
- Stefan-Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Strasse 19, 79104 Freiburg, Germany
| | - Praveen Kumar Maroju
- Stefan-Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Strasse 19, 79104 Freiburg, Germany
| | - Matteo Moioli
- Stefan-Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Strasse 19, 79104 Freiburg, Germany
| | - Giuseppe Sansone
- Stefan-Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Strasse 19, 79104 Freiburg, Germany
| | - Ronak Shah
- Stefan-Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Strasse 19, 79104 Freiburg, Germany
| | - Tamás Csizmadia
- ELI ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3, H-6728 Szeged, Hungary
| | - Mathieu Dumergue
- ELI ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3, H-6728 Szeged, Hungary
| | | | - Sergei Kühn
- ELI ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3, H-6728 Szeged, Hungary
| | | | | | | | | | - Marco Zangrando
- Department of Chemistry, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
- Elettra Sincrotrone Trieste, I-34149 Trieste, Italy
| | - Giovanni De Ninno
- Department of Chemistry, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
- Elettra Sincrotrone Trieste, I-34149 Trieste, Italy
| | | | - Luca Giannessi
- Department of Chemistry, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
- Elettra Sincrotrone Trieste, I-34149 Trieste, Italy
| | | | - Primoz Rebernik Ribic
- Department of Chemistry, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
- Elettra Sincrotrone Trieste, I-34149 Trieste, Italy
| | - Kevin C Prince
- Department of Chemistry, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
- Elettra Sincrotrone Trieste, I-34149 Trieste, Italy
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2
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Kretschmar M, Svirplys E, Volkov M, Witting T, Nagy T, Vrakking MJJ, Schütte B. Compact realization of all-attosecond pump-probe spectroscopy. SCIENCE ADVANCES 2024; 10:eadk9605. [PMID: 38381830 PMCID: PMC10881040 DOI: 10.1126/sciadv.adk9605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 01/17/2024] [Indexed: 02/23/2024]
Abstract
The ability to perform attosecond-pump attosecond-probe spectroscopy (APAPS) is a longstanding goal in ultrafast science. While first pioneering experiments demonstrated the feasibility of APAPS, the low repetition rates (10 to 120 Hz) and the large footprints of existing setups have so far hindered the widespread exploitation of APAPS. Here, we demonstrate two-color APAPS using a commercial laser system at 1 kHz, straightforward post-compression in a hollow-core fiber, and a compact high-harmonic generation (HHG) setup. The latter enables the generation of intense extreme-ultraviolet (XUV) pulses by using an out-of-focus HHG geometry and by exploiting a transient blueshift of the driving laser in the HHG medium. Near-isolated attosecond pulses are generated, as demonstrated by one-color and two-color XUV-pump XUV-probe experiments. Our concept allows selective pumping and probing on extremely short timescales in many laboratories and permits investigations of fundamental processes that are not accessible by other pump-probe techniques.
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Affiliation(s)
| | | | - Mikhail Volkov
- Max-Born-Institut, Max-Born-Strasse 2A, 12489 Berlin, Germany
| | - Tobias Witting
- Max-Born-Institut, Max-Born-Strasse 2A, 12489 Berlin, Germany
| | - Tamás Nagy
- Max-Born-Institut, Max-Born-Strasse 2A, 12489 Berlin, Germany
| | | | - Bernd Schütte
- Max-Born-Institut, Max-Born-Strasse 2A, 12489 Berlin, Germany
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3
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Hikosaka Y, Kaneyasu T, Wada S, Kohguchi H, Ota H, Nakamura E, Iwayama H, Fujimoto M, Hosaka M, Katoh M. Frequency-domain interferometry for the determination of time delay between two extreme-ultraviolet wave packets generated by a tandem undulator. Sci Rep 2023; 13:10292. [PMID: 37357245 DOI: 10.1038/s41598-023-37449-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/21/2023] [Indexed: 06/27/2023] Open
Abstract
Synchrotron radiation, emitted by relativistic electrons traveling in a magnetic field, has poor temporal coherence. However, recent research has proved that time-domain interferometry experiments, which were thought to be enabled by only lasers of excellent temporal coherence, can be implemented with synchrotron radiation using a tandem undulator. The radiation generated by the tandem undulator comprises pairs of light wave packets, and the longitudinal coherence within a light wave packet pair is used to achieve time-domain interferometry. The time delay between two light wave packets, formed by a chicane for the electron trajectory, can be adjusted in the femtosecond range by a standard synchrotron technology. In this study, we show that frequency-domain spectra of the tandem undulator radiation exhibit fringe structures from which the time delay between a light wave packet pair can be determined with accuracy on the order of attoseconds. The feasibility and limitations of the frequency-domain interferometric determination of the time delay are examined.
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Affiliation(s)
- Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama, 930-0194, Japan.
| | - T Kaneyasu
- SAGA Light Source, Tosu, 841-0005, Japan
- Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - S Wada
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - H Kohguchi
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - H Ota
- Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - E Nakamura
- Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - H Iwayama
- Institute for Molecular Science, Okazaki, 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki, 444-8585, Japan
| | - M Fujimoto
- Synchrotron Radiation Research Center, Nagoya University, Nagoya, 464-8603, Japan
| | - M Hosaka
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
| | - M Katoh
- Institute for Molecular Science, Okazaki, 444-8585, Japan
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, 739-0046, Japan
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4
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Keefer D, Cavaletto SM, Rouxel JR, Garavelli M, Yong H, Mukamel S. Ultrafast X-Ray Probes of Elementary Molecular Events. Annu Rev Phys Chem 2023; 74:73-97. [PMID: 37093660 DOI: 10.1146/annurev-physchem-062322-051532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
Elementary events that determine photochemical outcomes and molecular functionalities happen on the femtosecond and subfemtosecond timescales. Among the most ubiquitous events are the nonadiabatic dynamics taking place at conical intersections. These facilitate ultrafast, nonradiative transitions between electronic states in molecules that can outcompete slower relaxation mechanisms such as fluorescence. The rise of ultrafast X-ray sources, which provide intense light pulses with ever-shorter durations and larger observation bandwidths, has fundamentally revolutionized our spectroscopic capabilities to detect conical intersections. Recent theoretical studies have demonstrated an entirely new signature emerging once a molecule traverses a conical intersection, giving detailed insights into the coupled nuclear and electronic motions that underlie, facilitate, and ultimately determine the ultrafast molecular dynamics. Following a summary of current sources and experiments, we survey these techniques and provide a unified overview of their capabilities. We discuss their potential to dramatically increase our understanding of ultrafast photochemistry.
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Affiliation(s)
- Daniel Keefer
- Department of Chemistry and Department of Physics and Astronomy, University of California, Irvine, California, USA; ,
| | - Stefano M Cavaletto
- Department of Chemistry and Department of Physics and Astronomy, University of California, Irvine, California, USA; ,
- Current affiliation: Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
| | - Jérémy R Rouxel
- Université de Lyon, UJM-Saint-Etienne, IOGS, Laboratoire Hubert Curien, UMR CNRS 5516, Saint-Etienne, France
| | - Marco Garavelli
- Dipartimento di Chimica Industriale, Università degli Studi di Bologna, Bologna, Italy
| | - Haiwang Yong
- Department of Chemistry and Department of Physics and Astronomy, University of California, Irvine, California, USA; ,
| | - Shaul Mukamel
- Department of Chemistry and Department of Physics and Astronomy, University of California, Irvine, California, USA; ,
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5
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Schwickert D, Ruberti M, Kolorenč P, Przystawik A, Skruszewicz S, Sumfleth M, Braune M, Bocklage L, Carretero L, Czwalinna MK, Diaman D, Düsterer S, Kuhlmann M, Palutke S, Röhlsberger R, Rönsch-Schulenburg J, Toleikis S, Usenko S, Viefhaus J, Vorobiov A, Martins M, Kip D, Averbukh V, Marangos JP, Laarmann T. Charge-induced chemical dynamics in glycine probed with time-resolved Auger electron spectroscopy. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2022; 9:064301. [PMID: 36389279 PMCID: PMC9646253 DOI: 10.1063/4.0000165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
In the present contribution, we use x-rays to monitor charge-induced chemical dynamics in the photoionized amino acid glycine with femtosecond time resolution. The outgoing photoelectron leaves behind the cation in a coherent superposition of quantum mechanical eigenstates. Delayed x-ray pulses track the induced coherence through resonant x-ray absorption that induces Auger decay. Temporal modulation of the Auger electron signal correlated with specific ions is observed, which is governed by the initial electronic coherence and subsequent vibronic coupling to nuclear degrees of freedom. In the time-resolved x-ray absorption measurement, we monitor the time-frequency spectra of the resulting many-body quantum wave packets for a period of 175 fs along different reaction coordinates. Our experiment proves that by measuring specific fragments associated with the glycine dication as a function of the pump-probe delay, one can selectively probe electronic coherences at early times associated with a few distinguishable components of the broad electronic wave packet created initially by the pump pulse in the cation. The corresponding coherent superpositions formed by subsets of electronic eigenstates and evolving along parallel dynamical pathways show different phases and time periods in the range of ( - 0.3 ± 0.1 ) π ≤ ϕ ≤ ( 0.1 ± 0.2 ) π and 18.2 - 1.4 + 1.7 ≤ T ≤ 23.9 - 1.1 + 1.2 fs. Furthermore, for long delays, the data allow us to pinpoint the driving vibrational modes of chemical dynamics mediating charge-induced bond cleavage along different reaction coordinates.
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Affiliation(s)
- David Schwickert
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Marco Ruberti
- Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - Přemysl Kolorenč
- Charles University, Faculty of Mathematics and Physics, V Holesovickach 2, 180 00 Praha 8, Czech Republic
| | - Andreas Przystawik
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | - Malte Sumfleth
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Markus Braune
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | - Luis Carretero
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | - Dian Diaman
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Stefan Düsterer
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Marion Kuhlmann
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Steffen Palutke
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | | | - Sven Toleikis
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Sergey Usenko
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Jens Viefhaus
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany
| | - Anton Vorobiov
- Faculty of Electrical Engineering, Helmut Schmidt University, Holstenhofweg 85, 22043 Hamburg, Germany
| | - Michael Martins
- Department of Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Detlef Kip
- Faculty of Electrical Engineering, Helmut Schmidt University, Holstenhofweg 85, 22043 Hamburg, Germany
| | - Vitali Averbukh
- Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - Jon P. Marangos
- Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - Tim Laarmann
- Author to whom correspondence should be addressed:
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6
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Uhl D, Wituschek A, Michiels R, Trinter F, Jahnke T, Allaria E, Callegari C, Danailov M, Di Fraia M, Plekan O, Bangert U, Dulitz K, Landmesser F, Michelbach M, Simoncig A, Manfredda M, Spampinati S, Penco G, Squibb RJ, Feifel R, Laarmann T, Mudrich M, Prince KC, Cerullo G, Giannessi L, Stienkemeier F, Bruder L. Extreme Ultraviolet Wave Packet Interferometry of the Autoionizing HeNe Dimer. J Phys Chem Lett 2022; 13:8470-8476. [PMID: 36054027 PMCID: PMC9486932 DOI: 10.1021/acs.jpclett.2c01619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
Femtosecond extreme ultraviolet wave packet interferometry (XUV-WPI) was applied to study resonant interatomic Coulombic decay (ICD) in the HeNe dimer. The high demands on phase stability and sensitivity for vibronic XUV-WPI of molecular-beam targets are met using an XUV phase-cycling scheme. The detected quantum interferences exhibit vibronic dephasing and rephasing signatures along with an ultrafast decoherence assigned to the ICD process. A Fourier analysis reveals the molecular absorption spectrum with high resolution. The demonstrated experiment shows a promising route for the real-time analysis of ultrafast ICD processes with both high temporal and high spectral resolution.
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Affiliation(s)
- Daniel Uhl
- Institute
of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
| | - Andreas Wituschek
- Institute
of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
| | - Rupert Michiels
- Institute
of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
| | - Florian Trinter
- Institut
für Kernphysik, J. W. Goethe-Universität, Max-von-Laue-Strasse 1, 60438 Frankfurt am Main, Germany
- Molecular
Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Till Jahnke
- Institut
für Kernphysik, J. W. Goethe-Universität, Max-von-Laue-Strasse 1, 60438 Frankfurt am Main, Germany
- European
XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Enrico Allaria
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Carlo Callegari
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Miltcho Danailov
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Michele Di Fraia
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Oksana Plekan
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Ulrich Bangert
- Institute
of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
| | - Katrin Dulitz
- Institute
of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
| | - Friedemann Landmesser
- Institute
of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
| | - Moritz Michelbach
- Institute
of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
| | - Alberto Simoncig
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Michele Manfredda
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Simone Spampinati
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Giuseppe Penco
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Richard James Squibb
- Department
of Physics, University of Gothenburg, Origovägen 6 B, 41296 Gothenburg, Sweden
| | - Raimund Feifel
- Department
of Physics, University of Gothenburg, Origovägen 6 B, 41296 Gothenburg, Sweden
| | - Tim Laarmann
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
- The Hamburg
Centre for Ultrafast Imaging CUI, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Marcel Mudrich
- Department
of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus, Denmark
| | - Kevin C. Prince
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Giulio Cerullo
- IFN-CNR
and Dipartimento di Fisica, Politecnico
di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
| | - Luca Giannessi
- Elettra-Sincrotrone
Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
- Istituto
Nazionale di Fisica Nucleare, Laboratori
Nazionali di Frascati, Via E. Fermi 40, 00044 Frascati, Roma
| | - Frank Stienkemeier
- Institute
of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
| | - Lukas Bruder
- Institute
of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
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7
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High-resolution two-dimensional electronic spectroscopy reveals the homogeneous line profile of chromophores solvated in nanoclusters. Nat Commun 2022; 13:3350. [PMID: 35688839 PMCID: PMC9187667 DOI: 10.1038/s41467-022-31021-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 05/24/2022] [Indexed: 11/16/2022] Open
Abstract
Doped clusters in the gas phase provide nanoconfined model systems for the study of system-bath interactions. To gain insight into interaction mechanisms between chromophores and their environment, the ensemble inhomogeneity has to be lifted and the homogeneous line profile must be accessed. However, such measurements are very challenging at the low particle densities and low signal levels in cluster beam experiments. Here, we dope cryogenic rare-gas clusters with phthalocyanine molecules and apply action-detected two-dimensional electronic spectroscopy to gain insight into the local molecule-cluster environment for solid and superfluid cluster species. The high-resolution homogeneous linewidth analysis provides a benchmark for the theoretical modelling of binding configurations and shows a promising route for high-resolution molecular two-dimensional spectroscopy. Understanding the interaction of single chromophores with nanoparticles remains a challenging task in nanoscience. Here the authors provide insight into the interaction between isolated base-free phthalocyanine molecules and He and Ne nanoclusters in the gas phase using high-resolution two-dimensional spectroscopy.
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8
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Borrego-Varillas R, Lucchini M, Nisoli M. Attosecond spectroscopy for the investigation of ultrafast dynamics in atomic, molecular and solid-state physics. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2022; 85:066401. [PMID: 35294930 DOI: 10.1088/1361-6633/ac5e7f] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 03/16/2022] [Indexed: 06/14/2023]
Abstract
Since the first demonstration of the generation of attosecond pulses (1 as = 10-18s) in the extreme-ultraviolet spectral region, several measurement techniques have been introduced, at the beginning for the temporal characterization of the pulses, and immediately after for the investigation of electronic and nuclear ultrafast dynamics in atoms, molecules and solids with unprecedented temporal resolution. The attosecond spectroscopic tools established in the last two decades, together with the development of sophisticated theoretical methods for the interpretation of the experimental outcomes, allowed to unravel and investigate physical processes never observed before, such as the delay in photoemission from atoms and solids, the motion of electrons in molecules after prompt ionization which precede any notable nuclear motion, the temporal evolution of the tunneling process in dielectrics, and many others. This review focused on applications of attosecond techniques to the investigation of ultrafast processes in atoms, molecules and solids. Thanks to the introduction and ongoing developments of new spectroscopic techniques, the attosecond science is rapidly moving towards the investigation, understanding and control of coupled electron-nuclear dynamics in increasingly complex systems, with ever more accurate and complete investigation techniques. Here we will review the most common techniques presenting the latest results in atoms, molecules and solids.
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Affiliation(s)
- Rocío Borrego-Varillas
- Institute for Photonics and Nanotechnologies (IFN), Consiglio Nazionale delle Ricerche (CNR), Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Matteo Lucchini
- Institute for Photonics and Nanotechnologies (IFN), Consiglio Nazionale delle Ricerche (CNR), Piazza Leonardo da Vinci 32, 20133 Milano, Italy
- Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Mauro Nisoli
- Institute for Photonics and Nanotechnologies (IFN), Consiglio Nazionale delle Ricerche (CNR), Piazza Leonardo da Vinci 32, 20133 Milano, Italy
- Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
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9
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Koll LM, Maikowski L, Drescher L, Vrakking MJJ, Witting T. Phase-locking of time-delayed attosecond XUV pulse pairs. OPTICS EXPRESS 2022; 30:7082-7095. [PMID: 35299479 DOI: 10.1364/oe.452018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
We present a setup for the generation of phase-locked attosecond extreme ultraviolet (XUV) pulse pairs. The attosecond pulse pairs are generated by high harmonic generation (HHG) driven by two phase-locked near-infrared (NIR) pulses that are produced using an actively stabilized Mach-Zehnder interferometer compatible with near-single cycle pulses. The attosecond XUV pulses can be delayed over a range of 400 fs with a sub-10-as delay jitter. We validate the precision and the accuracy of the setup by XUV optical interferometry and by retrieving the energies of Rydberg states of helium in an XUV pump-NIR probe photoelectron spectroscopy experiment.
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10
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Reiche S, Knopp G, Pedrini B, Prat E, Aeppli G, Gerber S. A perfect X-ray beam splitter and its applications to time-domain interferometry and quantum optics exploiting free-electron lasers. Proc Natl Acad Sci U S A 2022; 119:e2117906119. [PMID: 35140184 PMCID: PMC8851450 DOI: 10.1073/pnas.2117906119] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/30/2021] [Indexed: 12/13/2022] Open
Abstract
X-ray free-electron lasers (FELs) deliver ultrabright X-ray pulses, but not the sequences of phase-coherent pulses required for time-domain interferometry and control of quantum states. For conventional split-and-delay schemes to produce such sequences, the challenge stems from extreme stability requirements when splitting Ångstrom wavelength beams, where the tiniest path-length differences introduce phase jitter. We describe an FEL mode based on selective electron-bunch degradation and transverse beam shaping in the accelerator, combined with a self-seeded photon emission scheme. Instead of splitting the photon pulses after their generation by the FEL, we split the electron bunch in the accelerator, prior to photon generation, to obtain phase-locked X-ray pulses with subfemtosecond duration. Time-domain interferometry becomes possible, enabling the concomitant program of classical and quantum optics experiments with X-rays. The scheme leads to scientific benefits of cutting-edge FELs with attosecond and/or high-repetition rate capabilities, ranging from the X-ray analog of Fourier transform infrared spectroscopy to damage-free measurements.
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Affiliation(s)
- Sven Reiche
- Large Research Facilities and Photon Science Divisions, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Gregor Knopp
- Large Research Facilities and Photon Science Divisions, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Bill Pedrini
- Large Research Facilities and Photon Science Divisions, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Eduard Prat
- Large Research Facilities and Photon Science Divisions, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Gabriel Aeppli
- Large Research Facilities and Photon Science Divisions, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland;
- Department of Physics, Eidgenössische Technische Hochschule Zurich, CH-8093 Zurich, Switzerland
- Institut de Physique, École Polytechnique Fédérale Lausanne, CH-1015 Lausanne, Switzerland
- Quantum Center, Eidgenössische Technische Hochschule Zurich, CH-8093 Zurich, Switzerland
| | - Simon Gerber
- Large Research Facilities and Photon Science Divisions, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland;
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11
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Skruszewicz S, Przystawik A, Schwickert D, Sumfleth M, Namboodiri M, Hilbert V, Klas R, Gierschke P, Schuster V, Vorobiov A, Haunhorst C, Kip D, Limpert J, Rothhardt J, Laarmann T. Table-top interferometry on extreme time and wavelength scales. OPTICS EXPRESS 2021; 29:40333-40344. [PMID: 34809377 DOI: 10.1364/oe.446563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
Short-pulse metrology and dynamic studies in the extreme ultraviolet (XUV) spectral range greatly benefit from interferometric measurements. In this contribution a Michelson-type all-reflective split-and-delay autocorrelator operating in a quasi amplitude splitting mode is presented. The autocorrelator works under a grazing incidence angle in a broad spectral range (10 nm - 1 μm) providing collinear propagation of both pulse replicas and thus a constant phase difference across the beam profile. The compact instrument allows for XUV pulse autocorrelation measurements in the time domain with a single-digit attosecond precision and a useful scan length of about 1 ps enabling a decent resolution of E/ΔE = 2000 at 26.6 eV. Its performance for selected spectroscopic applications requiring moderate resolution at short wavelengths is demonstrated by characterizing a sharp electronic transition at 26.6 eV in Ar gas. The absorption of the 11th harmonic of a frequency-doubled Yb-fiber laser leads to the well-known 3s3p64p1P1 Fano resonance of Ar atoms. We benchmark our time-domain interferometry results with a high-resolution XUV grating spectrometer and find an excellent agreement. The common-path interferometer opens up new opportunities for short-wavelength femtosecond and attosecond pulse metrology and dynamic studies on extreme time scales in various research fields.
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12
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Uhl D, Bruder L, Stienkemeier F. A flexible and scalable, fully software-based lock-in amplifier for nonlinear spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:083101. [PMID: 34470399 DOI: 10.1063/5.0059740] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 07/24/2021] [Indexed: 06/13/2023]
Abstract
We demonstrate a cost-effective, fully software-based lock-in amplifier (LIA) implemented on a commercial computer. The device is designed for application in nonlinear spectroscopy, such as transient absorption and coherent multidimensional spectroscopy, but may also be used in any other application. The performance of our device is compared to a state-of-the-art commercial LIA with nearly identical results for both devices. Advantages of our device over commercial hardwired electronic LIAs are the improved flexibility in the data analysis and the possibility of arbitrary up-scaling of the number of LIA channels.
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Affiliation(s)
- D Uhl
- Institute of Physics, University of Freiburg, 79104 Freiburg, Germany
| | - L Bruder
- Institute of Physics, University of Freiburg, 79104 Freiburg, Germany
| | - F Stienkemeier
- Institute of Physics, University of Freiburg, 79104 Freiburg, Germany
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13
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Prince KC, Diviacco B. On "Coherent control in the extreme ultraviolet and attosecond regime by synchrotron radiation" by Hikosaka et al, Nat. Comm. 10, 4988 (2019). Nat Commun 2021; 12:3784. [PMID: 34145233 PMCID: PMC8213757 DOI: 10.1038/s41467-021-24024-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 06/01/2021] [Indexed: 01/16/2023] Open
Affiliation(s)
- Kevin C Prince
- Elettra - Sincrotrone Trieste S.C.p.A, Basovizza, Trieste, Italy. .,Centre for Translational Atomaterials, Swinburne University of Technology, Melbourne, VIC, Australia.
| | - Bruno Diviacco
- Elettra - Sincrotrone Trieste S.C.p.A, Basovizza, Trieste, Italy
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14
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Segatta F, Nenov A, Nascimento DR, Govind N, Mukamel S, Garavelli M. iSPECTRON: A simulation interface for linear and nonlinear spectra with ab-initio quantum chemistry software. J Comput Chem 2021; 42:644-659. [PMID: 33556195 DOI: 10.1002/jcc.26485] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 01/05/2021] [Accepted: 01/11/2021] [Indexed: 12/18/2022]
Abstract
We introduce iSPECTRON, a program that parses data from common quantum chemistry software (NWChem, OpenMolcas, Gaussian, Cobramm, etc.), produces the input files for the simulation of linear and nonlinear spectroscopy of molecules with the Spectron code, and analyzes the spectra with a broad range of tools. Vibronic spectra are expressed in term of the electronic eigenstates, obtained from quantum chemistry computations, and vibrational/bath effects are incorporated in the framework of the displaced harmonic oscillator model, where all required quantities are computed at the Franck-Condon point. The program capabilities are illustrated by simulating linear absorption, transient absorption and two dimensional electronic spectra of the pyrene molecule. Calculations at two levels of electronic structure theory, time-dependent density functional theory (with NWChem) and RASSCF/RASPT2 (with OpenMolcas) are presented and compared where possible. The iSPECTRON program is available online at https://github.com/ispectrongit/iSPECTRON/ and distributed open source under the terms of the Educational Community License version 2.0 (ECL 2.0).
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Affiliation(s)
- Francesco Segatta
- Dipartimento di Chimica Industriale "Toso Montanari", Università degli Studi di Bologna, Bologna, Italy
| | - Artur Nenov
- Dipartimento di Chimica Industriale "Toso Montanari", Università degli Studi di Bologna, Bologna, Italy
| | - Daniel R Nascimento
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Niranjan Govind
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Shaul Mukamel
- Department of Chemistry and Department of Physics and Astronomy, University of California, Irvine, California, USA
| | - Marco Garavelli
- Dipartimento di Chimica Industriale "Toso Montanari", Università degli Studi di Bologna, Bologna, Italy
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15
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Sun Z, Yao H, Ren X, Liu Y, Wang D, Zhao W, Wang C, Yang C. Imaging of electron transition and bond breaking in the photodissociation of H 2+ via ultrafast X-ray photoelectron diffraction. OPTICS EXPRESS 2021; 29:10893-10902. [PMID: 33820212 DOI: 10.1364/oe.416927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 03/08/2021] [Indexed: 06/12/2023]
Abstract
We theoretically investigate the photodissociation dynamics of H2+ using the methodology of ultrafast X-ray photoelectron diffraction (UXPD). We use a femtosecond infrared pulse to prompt a coherent excitation from the molecular vibrational state (v = 9) of the electronic ground state (1sσg) and then adopt another time-delayed attosecond X-ray pulse to probe the dynamical properties. We have calculated photoionization momentum distributions by solving the non-Born-Oppenheimer time-dependent Schrödinger equation (TDSE). We unambiguously identify the phenomena associated with the g - u symmetry breakdown in the time-resolved photoelectron diffraction spectra. Using the two-center interference model, we can determine the variation in nuclear spacing with high accuracy. In addition, we use a strong field approximation (SFA) model to interpret the UXPD profile, and the SFA simulations can reproduce the TDSE results in a quantitative way.
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16
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Kaneyasu T, Hikosaka Y, Fujimoto M, Iwayama H, Katoh M. Electron Wave Packet Interference in Atomic Inner-Shell Excitation. PHYSICAL REVIEW LETTERS 2021; 126:113202. [PMID: 33798343 DOI: 10.1103/physrevlett.126.113202] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
We report the observation of quantum interference between electron wave packets launched from the inner-shell 4d orbital of the Xe atom. Using pairs of femtosecond radiation wave packets from a synchrotron light source, we obtain time-domain interferograms for the inner-shell excitations. This approach enables the experimental verification and control of the quantum interference between the electron wave packets. Furthermore, the femtosecond Auger decay of the inner-shell excited state is tracked. To the best of our knowledge, this is the first observation of wave packet interference in an atomic inner-shell process, and also the first time-resolved experiment on few-femtosecond Auger decay using a synchrotron light source.
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Affiliation(s)
- T Kaneyasu
- SAGA Light Source, Tosu 841-0005, Japan
- Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
| | - M Fujimoto
- Institute for Molecular Science, Okazaki 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan
| | - H Iwayama
- Institute for Molecular Science, Okazaki 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan
| | - M Katoh
- Institute for Molecular Science, Okazaki 444-8585, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
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17
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Keefer D, Freixas VM, Song H, Tretiak S, Fernandez-Alberti S, Mukamel S. Monitoring molecular vibronic coherences in a bichromophoric molecule by ultrafast X-ray spectroscopy. Chem Sci 2021; 12:5286-5294. [PMID: 34168779 PMCID: PMC8179640 DOI: 10.1039/d0sc06328b] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 02/24/2021] [Indexed: 11/21/2022] Open
Abstract
The role of quantum-mechanical coherences in the elementary photophysics of functional optoelectronic molecular materials is currently under active study. Designing and controlling stable coherences arising from concerted vibronic dynamics in organic chromophores is the key for numerous applications. Here, we present fundamental insight into the energy transfer properties of a rigid synthetic heterodimer that has been experimentally engineered to study coherences. Quantum non-adiabatic excited state simulations are used to compute X-ray Raman signals, which are able to sensitively monitor the coherence evolution. Our results verify their vibronic nature, that survives multiple conical intersection passages for several hundred femtoseconds at room temperature. Despite the contributions of highly heterogeneous evolution pathways, the coherences are unambiguously visualized by the experimentally accessible X-ray signals. They offer direct information on the dynamics of electronic and structural degrees of freedom, paving the way for detailed coherence measurements in functional organic materials.
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Affiliation(s)
- Daniel Keefer
- Departments of Chemistry and Physics and Astronomy, University of California Irvine California 92697-2025 USA
| | - Victor M Freixas
- Departamento de Ciencia y Tecnologia, Universidad Nacional de Quilmes/CONICET B1876BXD Bernal Argentina
| | - Huajing Song
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Sergei Tretiak
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | | | - Shaul Mukamel
- Departments of Chemistry and Physics and Astronomy, University of California Irvine California 92697-2025 USA
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18
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Jiang S, Kowalewski M, Dorfman KE. Multi-wave mixing in the high harmonic regime: monitoring electronic dynamics. OPTICS EXPRESS 2021; 29:4746-4754. [PMID: 33726024 DOI: 10.1364/oe.414619] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
It has been demonstrated that electronic coherences across many eV can be detected in pump-probe experiments involving high harmonic sources. An additional degree of control over the phase matching can be employed by investigating a more general class of multi-wave mixing. Non-collinear multi-wave mixing of high harmonics with energy (q1ω1 + q2ω2) can be selectively detected along the direction of (q1k1 + q2k2). Simulations based on a recently developed semi-perturbative approach show that only the specific harmonic signals with q1ω1 close to the energy difference between ground state and excited states are observable when the two input pulses are well separated in time. The coherent dynamics between different states can be selectively tracked by detecting the time-delay dependent signals with different q1k1, which can overcome the potential spectral congestion in real experiments. Additionally, such non-collinear geometry can be used to separate the dephasing induced decay and collision induced recovery behaviors of pump-probe high harmonic signal typically observed in the time-resolved high harmonic pump-probe signals.
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19
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Tuitje F, Martínez Gil P, Helk T, Gautier J, Tissandier F, Goddet JP, Guggenmos A, Kleineberg U, Sebban S, Oliva E, Spielmann C, Zürch M. Nonlinear ionization dynamics of hot dense plasma observed in a laser-plasma amplifier. LIGHT, SCIENCE & APPLICATIONS 2020; 9:187. [PMID: 33298838 PMCID: PMC7673011 DOI: 10.1038/s41377-020-00424-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 10/15/2020] [Accepted: 10/26/2020] [Indexed: 06/12/2023]
Abstract
Understanding the behaviour of matter under conditions of extreme temperature, pressure, density and electromagnetic fields has profound effects on our understanding of cosmologic objects and the formation of the universe. Lacking direct access to such objects, our interpretation of observed data mainly relies on theoretical models. However, such models, which need to encompass nuclear physics, atomic physics and plasma physics over a huge dynamic range in the dimensions of energy and time, can only provide reliable information if we can benchmark them to experiments under well-defined laboratory conditions. Due to the plethora of effects occurring in this kind of highly excited matter, characterizing isolated dynamics or obtaining direct insight remains challenging. High-density plasmas are turbulent and opaque for radiation below the plasma frequency and allow only near-surface insight into ionization processes with visible wavelengths. Here, the output of a high-harmonic seeded laser-plasma amplifier using eight-fold ionized krypton as the gain medium operating at a 32.8 nm wavelength is ptychographically imaged. A complex-valued wavefront is observed in the extreme ultraviolet (XUV) beam with high resolution. Ab initio spatio-temporal Maxwell-Bloch simulations show excellent agreement with the experimental observations, revealing overionization of krypton in the plasma channel due to nonlinear laser-plasma interactions, successfully validating this four-dimensional multiscale model. This constitutes the first experimental observation of the laser ion abundance reshaping a laser-plasma amplifier. The presented approach shows the possibility of directly modelling light-plasma interactions in extreme conditions, such as those present during the early times of the universe, with direct experimental verification.
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Affiliation(s)
- F Tuitje
- Institute for Optics and Quantum Electronics, Abbe Center of Photonics, University of Jena, Jena, Germany.
- Helmholtz Institute Jena, Jena, Germany.
| | - P Martínez Gil
- Departamento de Ingeniería Energética and Instituto de Fusión Nuclear "Guillermo Velarde", ETSI Industriales, Universidad Politécnica de Madrid, Madrid, Spain
| | - T Helk
- Institute for Optics and Quantum Electronics, Abbe Center of Photonics, University of Jena, Jena, Germany
- Helmholtz Institute Jena, Jena, Germany
| | - J Gautier
- Laboratoire d'Optique Appliquée, ENSTA Paris, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, Palaiseau, France
| | - F Tissandier
- Laboratoire d'Optique Appliquée, ENSTA Paris, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, Palaiseau, France
| | - J-P Goddet
- Laboratoire d'Optique Appliquée, ENSTA Paris, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, Palaiseau, France
| | - A Guggenmos
- Department for Physics, Ludwig-Maximilian-University Munich, Garching, Germany
- UltraFast Innovations GmbH, Garching, Germany
| | - U Kleineberg
- Department for Physics, Ludwig-Maximilian-University Munich, Garching, Germany
| | - S Sebban
- Laboratoire d'Optique Appliquée, ENSTA Paris, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, Palaiseau, France
| | - E Oliva
- Departamento de Ingeniería Energética and Instituto de Fusión Nuclear "Guillermo Velarde", ETSI Industriales, Universidad Politécnica de Madrid, Madrid, Spain.
| | - C Spielmann
- Institute for Optics and Quantum Electronics, Abbe Center of Photonics, University of Jena, Jena, Germany
- Helmholtz Institute Jena, Jena, Germany
| | - M Zürch
- Institute for Optics and Quantum Electronics, Abbe Center of Photonics, University of Jena, Jena, Germany.
- Helmholtz Institute Jena, Jena, Germany.
- Fritz Haber Institute of the Max Planck Society, Berlin, Germany.
- Department of Chemistry, University of California at Berkeley, Berkeley, CA, USA.
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
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20
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A novel spectroscopic window on conical intersections in biomolecules. Proc Natl Acad Sci U S A 2020; 117:26553-26555. [PMID: 33077586 DOI: 10.1073/pnas.2018651117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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21
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Visualizing conical intersection passages via vibronic coherence maps generated by stimulated ultrafast X-ray Raman signals. Proc Natl Acad Sci U S A 2020; 117:24069-24075. [PMID: 32929028 DOI: 10.1073/pnas.2015988117] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The rates and outcomes of virtually all photophysical and photochemical processes are determined by conical intersections. These are regions of degeneracy between electronic states on the nuclear landscape of molecules where electrons and nuclei evolve on comparable timescales and thus become strongly coupled, enabling radiationless relaxation channels upon optical excitation. Due to their ultrafast nature and vast complexity, monitoring conical intersections experimentally is an open challenge. We present a simulation study on the ultrafast photorelaxation of uracil, based on a quantum description of the nuclei. We demonstrate an additional window into conical intersections obtained by recording the transient wavepacket coherence during this passage with an X-ray free-electron laser pulse. Two major findings are reported. First, we find that the vibronic coherence at the conical intersection lives for several hundred femtoseconds and can be measured during this entire time. Second, the time-dependent energy-splitting landscape of the participating vibrational and electronic states is directly extracted from Wigner spectrograms of the signal. These offer a physical picture of the quantum conical intersection pathways through visualizing their transient vibronic coherence distributions. The path of a nuclear wavepacket in the vicinity of the conical intersection is directly mapped by the proposed experiment.
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22
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Wituschek A, Bruder L, Allaria E, Bangert U, Binz M, Callegari C, Cinquegrana P, Danailov M, Demidovich A, Di Fraia M, Feifel R, Laarmann T, Michiels R, Mudrich M, Nikolov I, Piseri P, Plekan O, Charles Prince K, Przystawik A, Rebernic Ribič P, Sigalotti P, Stranges S, Uhl D, Giannessi L, Stienkemeier F. High-gain harmonic generation with temporally overlapping seed pulses and application to ultrafast spectroscopy. OPTICS EXPRESS 2020; 28:29976-29990. [PMID: 33114885 DOI: 10.1364/oe.401249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/07/2020] [Indexed: 06/11/2023]
Abstract
Collinear double-pulse seeding of the High-Gain Harmonic Generation (HGHG) process in a free-electron laser (FEL) is a promising approach to facilitate various coherent nonlinear spectroscopy schemes in the extreme ultraviolet (XUV) spectral range. However, in collinear arrangements using a single nonlinear medium, temporally overlapping seed pulses may introduce nonlinear mixing signals that compromise the experiment at short time delays. Here, we investigate these effects in detail by extending the analysis described in a recent publication (Wituschek et al., Nat. Commun., 11, 883, 2020). High-order fringe-resolved autocorrelation and wave packet interferometry experiments at photon energies > 23 eV are performed, accompanied by numerical simulations. It turns out that both the autocorrelation and the wave-packet interferometry data are very sensitive to saturation effects and can thus be used to characterize saturation in the HGHG process. Our results further imply that time-resolved spectroscopy experiments are feasible even for time delays smaller than the seed pulse duration.
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23
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Mashiko H, Chen MC, Asaga K, Oshima A, Katayama I, Takeda J, Nishikawa T, Oguri K. Spatially resolved spectral phase interferometry with an isolated attosecond pulse. OPTICS EXPRESS 2020; 28:21025-21034. [PMID: 32680150 DOI: 10.1364/oe.393922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
We demonstrate spatially resolved supercontinuum spectral phase interferometry with an isolated attosecond pulse (IAP). The measured spatial-spectral interferogram over the broadband region indicates a high degree of IAP coherence in both spatial and spectral domains. In addition, the spectral-delay interferogram shows periodic temporal oscillations over the full IAP continuous spectrum, which indicates high temporal coherence. The supercontinuum spectral phase interferometry with broadband IAP will contribute to exploring spatiotemporal dispersive electronic dynamics through phase-based spectroscopy in the future.
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