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Fu Y, Wang B, Wang K, Tang X, Li B, Yin Z, Han J, Lin CD, Jin C. Controlling laser-dressed resonance line shape using attosecond extreme-ultraviolet pulse with a spectral minimum. Proc Natl Acad Sci U S A 2024; 121:e2307836121. [PMID: 38170749 PMCID: PMC10786267 DOI: 10.1073/pnas.2307836121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 12/01/2023] [Indexed: 01/05/2024] Open
Abstract
High-harmonic generation from a gas target exhibits sharp spectral features and rapid phase variation near the Cooper minimum. By applying spectral filtering, shaped isolated attosecond pulses can be generated where the pulse is split into two in the time domain. Using such shaped extreme-ultraviolet (XUV) pulses, we theoretically study attosecond transient absorption (ATA) spectra of helium [Formula: see text] autoionizing state which is resonantly coupled to the [Formula: see text] dark state by a time-delayed infrared laser. Our simulations show that the asymmetric [Formula: see text] Fano line shape can be readily tuned into symmetric Lorentzian within the time delay of a few tens of attoseconds. Such efficient control is due to the destructive interference in the generation of the [Formula: see text] state when it is excited by a strongly shaped XUV pulse. This is to be compared to prior experiments where tuning the line shape of a Fano resonance would take tens of femtoseconds. We also show that the predicted ATA spectral line shape can be observed experimentally after propagation in a gas medium. Our results suggest that strongly shaped attosecond XUV pulses offer the opportunity for controlling and probing fine features of narrow resonances on the few-ten attoseconds timescale.
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Affiliation(s)
- Yong Fu
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Bincheng Wang
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Kan Wang
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Xiangyu Tang
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Baochang Li
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Zhiming Yin
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Jiaxin Han
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - C. D. Lin
- Department of Physics, James R. Macdonald Laboratory, Kansas State University, Manhattan, KS66506
| | - Cheng Jin
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
- Ministry of Industry and Information Technology Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
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2
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Straub M, Ding T, Rebholz M, Borisova GD, Magunia A, Lindenblatt H, Meister S, Trost F, Wang Y, Palutke S, Braune M, Düsterer S, Treusch R, Greene CH, Moshammer R, Pfeifer T, Ott C. Differential Measurement of Electron Ejection after Two-Photon Two-Electron Excitation of Helium. PHYSICAL REVIEW LETTERS 2022; 129:183204. [PMID: 36374686 DOI: 10.1103/physrevlett.129.183204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
We report the measurement of the photoelectron angular distribution of two-photon single-ionization near the 2p^{2} ^{1}D^{e} double-excitation resonance in helium, benchmarking the fundamental nonlinear interaction of two photons with two correlated electrons. This observation is enabled by the unique combination of intense extreme ultraviolet pulses, delivered at the high-repetition-rate free-electron laser in Hamburg (FLASH), ionizing a jet of cryogenically cooled helium atoms in a reaction microscope. The spectral structure of the intense self-amplified spontaneous emission free-electron laser pulses has been resolved on a single-shot level to allow for post selection of pulses, leading to an enhanced spectral resolution, and introducing a new experimental method. The measured angular distribution is directly compared to state-of-the-art theory based on multichannel quantum defect theory and the streamlined R-matrix method. These results and experimental methodology open a promising route for exploring fundamental interactions of few photons with few electrons in general.
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Affiliation(s)
- Michael Straub
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Thomas Ding
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Marc Rebholz
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Gergana D Borisova
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Alexander Magunia
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Hannes Lindenblatt
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Severin Meister
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Florian Trost
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Yimeng Wang
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - Steffen Palutke
- Deutsches Elektronen Synchroton DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Markus Braune
- Deutsches Elektronen Synchroton DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Stefan Düsterer
- Deutsches Elektronen Synchroton DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Rolf Treusch
- Deutsches Elektronen Synchroton DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Chris H Greene
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - Robert Moshammer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Thomas Pfeifer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Christian Ott
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
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3
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Attosecond Transient Absorption Below the Excited States. PHOTONICS 2022. [DOI: 10.3390/photonics9040269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, the attosecond transient absorption (ATA) spectrum below the excited states of the helium atom was investigated by numerically solving the fully three-dimensional time-dependent Schrödinger equation. Under single-active electron approximation, the helium atom was illuminated by a combined field comprising of extreme ultraviolet (XUV) and delayed infrared (IR) fields. The response function demonstrates that the absorption near the central frequency (ωX) of the XUV field is periodically modulated during the overlapping between the XUV and IR pulses. Using the time-dependent perturbation, the absorption near ωX is attributed to the wavepacket excited by the XUV pulse. The wave function oscillating at the frequency of the XUV pulse was obtained. Furthermore, the chirp-dependent absorption spectrum near ωX potentially provides an all-optical method for characterizing the attosecond pulse duration. Finally, these results can extend to other systems, such as solids or liquids, indicating a potential for application in photonic devices, and they may be meaningful for quantum manipulation.
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4
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Appi E, Papadopoulou CC, Mapa JL, Jusko C, Mosel P, Schoenberg A, Stock J, Feigl T, Ališauskas S, Lang T, Heyl CM, Manschwetus B, Brachmanski M, Braune M, Lindenblatt H, Trost F, Meister S, Schoch P, Trabattoni A, Calegari F, Treusch R, Moshammer R, Hartl I, Morgner U, Kovacev M. Synchronized beamline at FLASH2 based on high-order harmonic generation for two-color dynamics studies. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:123004. [PMID: 34972439 DOI: 10.1063/5.0063225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 11/26/2021] [Indexed: 06/14/2023]
Abstract
We present the design, integration, and operation of the novel vacuum ultraviolet (VUV) beamline installed at the free-electron laser (FEL) FLASH. The VUV source is based on high-order harmonic generation (HHG) in gas and is driven by an optical laser system synchronized with the timing structure of the FEL. Ultrashort pulses in the spectral range from 10 to 40 eV are coupled with the FEL in the beamline FL26, which features a reaction microscope (REMI) permanent endstation for time-resolved studies of ultrafast dynamics in atomic and molecular targets. The connection of the high-pressure gas HHG source to the ultra-high vacuum FEL beamline requires a compact and reliable system, able to encounter the challenging vacuum requirements and coupling conditions. First commissioning results show the successful operation of the beamline, reaching a VUV focused beam size of about 20 µm at the REMI endstation. Proof-of-principle photo-electron momentum measurements in argon indicate the source capabilities for future two-color pump-probe experiments.
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Affiliation(s)
- E Appi
- Institut für Quantenoptik, Leibniz Universität Hannover, Hannover 30167, Germany
| | | | - J L Mapa
- Institut für Quantenoptik, Leibniz Universität Hannover, Hannover 30167, Germany
| | - C Jusko
- Institut für Quantenoptik, Leibniz Universität Hannover, Hannover 30167, Germany
| | - P Mosel
- Institut für Quantenoptik, Leibniz Universität Hannover, Hannover 30167, Germany
| | | | - J Stock
- Carl Zeiss AG, Oberkochen 73446, Germany
| | - T Feigl
- optiX fab GmbH, Jena 07745, Germany
| | | | - T Lang
- DESY, Hamburg 22607, Germany
| | | | | | | | | | - H Lindenblatt
- Max-Planck-Institut für Kernphysik, Heidelberg 69117, Germany
| | - F Trost
- Max-Planck-Institut für Kernphysik, Heidelberg 69117, Germany
| | - S Meister
- Max-Planck-Institut für Kernphysik, Heidelberg 69117, Germany
| | - P Schoch
- Institut für Umweltphysik, Ruprecht-Karls-Universität Heidelberg, Heidelberg 69120, Germany
| | - A Trabattoni
- Center for Free-Electron Laser Science CFEL, DESY, Hamburg 22607, Germany
| | - F Calegari
- Center for Free-Electron Laser Science CFEL, DESY, Hamburg 22607, Germany
| | | | - R Moshammer
- Max-Planck-Institut für Kernphysik, Heidelberg 69117, Germany
| | - I Hartl
- DESY, Hamburg 22607, Germany
| | - U Morgner
- Institut für Quantenoptik, Leibniz Universität Hannover, Hannover 30167, Germany
| | - M Kovacev
- Institut für Quantenoptik, Leibniz Universität Hannover, Hannover 30167, Germany
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5
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Sun J, Ding Z, Yu Y, Liang W. Nonlinear features of Fano resonance: a QM/EM study. Phys Chem Chem Phys 2021; 23:15994-16004. [PMID: 34318831 DOI: 10.1039/d1cp02459k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The nonlinear Fano effects on the absorption of hybrid systems composed of a silver nanosphere and an indoline dye molecule have been systematically investigated by the hybrid approach, which combines the quantum mechanics method (QM) with the computational electromagnetic method (EM). The absorption spectra of the dye molecule in the proximity of an Ag nanoparticle have been calculated by changing the incident field intensity, the phenomenological dephasing of molecular excitation, and the enhancement ratio of the near field. The contribution of molecular nonlinear response properties and the quantum interferences of the incident and scattered fields and of resonant plasmon-molecular excitations to the spectra has been identified. It is in no doubt that Fano resonance due to the plasmon-molecular interaction can appear in both the weak and strong field regimes; however, the Fano effect is more pronounced in the strong field regime where quantum interference leads to a nonlinear Fano effect controlled by a complex field-dependent Fano factor. When the incident field is strong enough, the resonance antisymmetry structure is spectrally resolved, and it changes with the change of the field intensity. As the field intensity varies from weak to strong, the Fano lineshape's asymmetry increases with increasing intensity in the beginning, and then decreases with a further increase of the field intensity attributed to the increase of the detuning energy induced by the integrated energy shift upon field dressing during the excitation. Decreasing the enhancement ratio of the near field or the dephasing of molecular excitation can also control the spectral lineshape transformation from an asymmetric profile to a symmetric Lorentzian lineshape. These findings are consistent with previous experimental and theoretical observations arisen by quantum interferences and are expected to stimulate further work toward exploring the plasmon-molecular interplay and the applications of Fano resonance in optical switching and sensing.
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Affiliation(s)
- Jin Sun
- School of Physics and Optoelectronics Engineering, Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion, Anhui University, Hefei 230601, People's Republic of China
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6
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Ding T, Rebholz M, Aufleger L, Hartmann M, Stooß V, Magunia A, Birk P, Borisova GD, da Costa Castanheira C, Rupprecht P, Mi Y, Gaumnitz T, Loh ZH, Roling S, Butz M, Zacharias H, Düsterer S, Treusch R, Ott C, Pfeifer T. XUV pump-XUV probe transient absorption spectroscopy at FELs. Faraday Discuss 2021; 228:519-536. [PMID: 33575691 DOI: 10.1039/d0fd00107d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The emergence of ultra-intense extreme-ultraviolet (XUV) and X-ray free-electron lasers (FELs) has opened the door for the experimental realization of non-linear XUV and X-ray spectroscopy techniques. Here we demonstrate an experimental setup for an all-XUV transient absorption spectroscopy method for gas-phase targets at the FEL. The setup combines a high spectral resolving power of E/ΔE ≈ 1500 with sub-femtosecond interferometric resolution, and covers a broad XUV photon-energy range between approximately 20 and 110 eV. We demonstrate the feasibility of this setup firstly on a neon target. Here, we intensity- and time-resolve key aspects of non-linear XUV-FEL light-matter interactions, namely the non-resonant ionization dynamics and resonant coupling dynamics of bound states, including XUV-induced Stark shifts of energy levels. Secondly, we show that this setup is capable of tracking the XUV-initiated dissociation dynamics of small molecular targets (oxygen and diiodomethane) with site-specific resolution, by measuring the XUV transient absorption spectrum. In general, benefitting from a single-shot detection capability, we show that the setup and method provides single-shot phase-locked XUV pulse pairs. This lays the foundation to perform, in the future, experiments as a function of the XUV interferometric time delay and the relative phase, which enables advanced coherent non-linear spectroscopy schemes in the XUV and X-ray spectral range.
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Affiliation(s)
- Thomas Ding
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | - Marc Rebholz
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | - Lennart Aufleger
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | - Maximilian Hartmann
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | - Veit Stooß
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | - Alexander Magunia
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | - Paul Birk
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | | | | | - Patrick Rupprecht
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | - Yonghao Mi
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | - Thomas Gaumnitz
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Zhi-Heng Loh
- Division of Chemistry and Biological Chemistry, Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Sebastian Roling
- Physikalisches Institut der Westfälischen Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
| | - Marco Butz
- Center for Soft Nanoscience, Busso-Peuss-Straße 10, 48149 Münster, Germany
| | - Helmut Zacharias
- Center for Soft Nanoscience, Busso-Peuss-Straße 10, 48149 Münster, Germany
| | - Stefan Düsterer
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Rolf Treusch
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Christian Ott
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
| | - Thomas Pfeifer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
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7
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Ferrante C, Principi E, Marini A, Batignani G, Fumero G, Virga A, Foglia L, Mincigrucci R, Simoncig A, Spezzani C, Masciovecchio C, Scopigno T. Non-linear self-driven spectral tuning of Extreme Ultraviolet Femtosecond Pulses in monoatomic materials. LIGHT, SCIENCE & APPLICATIONS 2021; 10:92. [PMID: 33911069 PMCID: PMC8080687 DOI: 10.1038/s41377-021-00531-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 03/23/2021] [Accepted: 04/07/2021] [Indexed: 06/12/2023]
Abstract
Self-action nonlinearity is a key aspect - either as a foundational element or a detrimental factor - of several optical spectroscopies and photonic devices. Supercontinuum generation, wavelength converters, and chirped pulse amplification are just a few examples. The recent advent of Free Electron Lasers (FEL) fostered building on nonlinearity to propose new concepts and extend optical wavelengths paradigms for extreme ultraviolet (EUV) and X-ray regimes. No evidence for intrapulse dynamics, however, has been reported at such short wavelengths, where the light-matter interactions are ruled by the sharp absorption edges of core electrons. Here, we provide experimental evidence for self-phase modulation of femtosecond FEL pulses, which we exploit for fine self-driven spectral tunability by interaction with sub-micrometric foils of selected monoatomic materials. Moving the pulse wavelength across the absorption edge, the spectral profile changes from a non-linear spectral blue-shift to a red-shifted broadening. These findings are rationalized accounting for ultrafast ionization and delayed thermal response of highly excited electrons above and below threshold, respectively.
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Affiliation(s)
- Carino Ferrante
- Graphene Labs, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy.
- Center for Life Nano Science @Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, I-00161, Roma, Italy.
- Dipartimento di Fisica, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Roma, Italy.
| | - Emiliano Principi
- Elettra-Sincrotrone Trieste S.C.p.A., SS 14-km 163.5, 34149, Basovizza, Trieste, Italy
| | - Andrea Marini
- Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, Via Vetoio, 67100, L'Aquila, Italy
| | - Giovanni Batignani
- Dipartimento di Fisica, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Giuseppe Fumero
- Dipartimento di Fisica, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Alessandra Virga
- Center for Life Nano Science @Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, I-00161, Roma, Italy
| | - Laura Foglia
- Elettra-Sincrotrone Trieste S.C.p.A., SS 14-km 163.5, 34149, Basovizza, Trieste, Italy
| | - Riccardo Mincigrucci
- Elettra-Sincrotrone Trieste S.C.p.A., SS 14-km 163.5, 34149, Basovizza, Trieste, Italy
| | - Alberto Simoncig
- Elettra-Sincrotrone Trieste S.C.p.A., SS 14-km 163.5, 34149, Basovizza, Trieste, Italy
| | - Carlo Spezzani
- Elettra-Sincrotrone Trieste S.C.p.A., SS 14-km 163.5, 34149, Basovizza, Trieste, Italy
| | - Claudio Masciovecchio
- Elettra-Sincrotrone Trieste S.C.p.A., SS 14-km 163.5, 34149, Basovizza, Trieste, Italy
| | - Tullio Scopigno
- Graphene Labs, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy.
- Center for Life Nano Science @Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, I-00161, Roma, Italy.
- Dipartimento di Fisica, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Roma, Italy.
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8
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Bound-State Electron Dynamics Driven by Near-Resonantly Detuned Intense and Ultrashort Pulsed XUV Fields. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10186153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We report on numerical results revealing line-shape asymmetry changes of electronic transitions in atoms near-resonantly driven by intense extreme-ultraviolet (XUV) electric fields by monitoring their transient absorption spectrum after transmission through a moderately dense atomic medium. Our numerical model utilizes ultrashort broadband XUV laser pulses varied in their intensity (1014–1015 W/cm2) and detuning nearly out of resonance for a quantitative evaluation of the absorption line-shape asymmetry. It will be shown how transient energy shifts of the bound electronic states can be linked to these asymmetry changes in the case of an ultrashort XUV driving pulse temporally shorter than the lifetime of the resonant excitation, and how the asymmetry can be controlled by the near-resonant detuning of the XUV pulse. In the case of a two-level system, the numerical model is compared to an analytical calculation, which helps to uncover the underlying mechanism for the detuning- and intensity-induced line-shape modification and links it to the generalized Rabi frequency. To further apply the numerical model to recent experimental results of the near-resonant dressing of the 2s2p doubly excited state in helium by an ultrashort XUV free-electron laser pulse we extend the two-level model with an ionization continuum, thereby enabling the description of transmission-type (Fraunhofer-like) transient absorption of a strongly laser-coupled autoionizing state.
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9
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Jiang WC, Chen SG, Peng LY, Burgdörfer J. Two-Electron Interference in Strong-Field Ionization of He by a Short Intense Extreme Ultraviolet Laser Pulse. PHYSICAL REVIEW LETTERS 2020; 124:043203. [PMID: 32058759 DOI: 10.1103/physrevlett.124.043203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Indexed: 06/10/2023]
Abstract
Double ionization of helium by a single intense (above 10^{18} W/cm^{2}) linearly polarized extreme ultraviolet laser pulse is studied by numerically solving the full-dimensional time-dependent Schrödinger equation. For the laser intensities well beyond the perturbative limit, novel gridlike interference fringes are found in the correlated energy spectrum of the two photoelectrons. The interference can be traced to the multitude of two-electron wave packets emitted at different ionization times. A semianalytical model for the dressed two-photon double ionization is shown to qualitatively account for the interference patterns in the joint energy spectrum. Similar signatures of interferences between transient induced time-delayed ionization bursts are expected for other atomic and molecular multielectron systems.
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Affiliation(s)
- Wei-Chao Jiang
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- State Key Laboratory for Mesoscopic Physics and Collaborative Innovation Center of Quantum Matter, School of Physics, Peking University, Beijing 100871, China
- Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, A-1040 Vienna, Austria, EU
| | - Si-Ge Chen
- State Key Laboratory for Mesoscopic Physics and Collaborative Innovation Center of Quantum Matter, School of Physics, Peking University, Beijing 100871, China
| | - Liang-You Peng
- State Key Laboratory for Mesoscopic Physics and Collaborative Innovation Center of Quantum Matter, School of Physics, Peking University, Beijing 100871, China
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China
| | - Joachim Burgdörfer
- Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, A-1040 Vienna, Austria, EU
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