Interference of electron wave packets in atomic ionization by subcycle sculpted laser pulses
We present a theoretical analysis of the atomic photoelectron emission spectra produced by a linearly polarized sculpted laser pulse of two colors with frequencies ω and 2ω. The spectrum of the "direct" electrons with intermediate energies prominently features both intracycle and intercycl...
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2014
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v89_n4_p_Arbo http://hdl.handle.net/20.500.12110/paper_10502947_v89_n4_p_Arbo |
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paper:paper_10502947_v89_n4_p_Arbo2023-06-08T16:02:48Z Interference of electron wave packets in atomic ionization by subcycle sculpted laser pulses Color Electron emission Emission spectroscopy Laser pulses Analytic expressions Interference patterns Interference structures Intermediate energies Photo-electron emission Semi-classical approximation Strong field ionization Strong-field approximations Ionization We present a theoretical analysis of the atomic photoelectron emission spectra produced by a linearly polarized sculpted laser pulse of two colors with frequencies ω and 2ω. The spectrum of the "direct" electrons with intermediate energies prominently features both intracycle and intercycle interferences. We derive a simple analytic expression for this spectral range based on a semiclassical approximation of the time-dependent distorted wave strong-field approximation generalized to strong-field ionization by a two-color pulse. We verify its applicability to approximately represent the intricate interference patterns by comparison with the exact solutions of the time-dependent Schrödinger equation and with the strong-field approximation. We show that the interference patterns can be tuned and its contrast enhanced by the additional "knob" available, the relative phase between the two frequency components. The present results confirm that two-color ionization allows resolving interference structures originating from trajectories launched within a time interval of less than 100 as [X. Xie, Phys. Rev. Lett. 108, 193004 (2012)PRLTAO0031-900710.1103/PhysRevLett.108.193004]. © 2014 American Physical Society. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v89_n4_p_Arbo http://hdl.handle.net/20.500.12110/paper_10502947_v89_n4_p_Arbo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Color Electron emission Emission spectroscopy Laser pulses Analytic expressions Interference patterns Interference structures Intermediate energies Photo-electron emission Semi-classical approximation Strong field ionization Strong-field approximations Ionization |
| spellingShingle |
Color Electron emission Emission spectroscopy Laser pulses Analytic expressions Interference patterns Interference structures Intermediate energies Photo-electron emission Semi-classical approximation Strong field ionization Strong-field approximations Ionization Interference of electron wave packets in atomic ionization by subcycle sculpted laser pulses |
| topic_facet |
Color Electron emission Emission spectroscopy Laser pulses Analytic expressions Interference patterns Interference structures Intermediate energies Photo-electron emission Semi-classical approximation Strong field ionization Strong-field approximations Ionization |
| description |
We present a theoretical analysis of the atomic photoelectron emission spectra produced by a linearly polarized sculpted laser pulse of two colors with frequencies ω and 2ω. The spectrum of the "direct" electrons with intermediate energies prominently features both intracycle and intercycle interferences. We derive a simple analytic expression for this spectral range based on a semiclassical approximation of the time-dependent distorted wave strong-field approximation generalized to strong-field ionization by a two-color pulse. We verify its applicability to approximately represent the intricate interference patterns by comparison with the exact solutions of the time-dependent Schrödinger equation and with the strong-field approximation. We show that the interference patterns can be tuned and its contrast enhanced by the additional "knob" available, the relative phase between the two frequency components. The present results confirm that two-color ionization allows resolving interference structures originating from trajectories launched within a time interval of less than 100 as [X. Xie, Phys. Rev. Lett. 108, 193004 (2012)PRLTAO0031-900710.1103/PhysRevLett.108.193004]. © 2014 American Physical Society. |
| title |
Interference of electron wave packets in atomic ionization by subcycle sculpted laser pulses |
| title_short |
Interference of electron wave packets in atomic ionization by subcycle sculpted laser pulses |
| title_full |
Interference of electron wave packets in atomic ionization by subcycle sculpted laser pulses |
| title_fullStr |
Interference of electron wave packets in atomic ionization by subcycle sculpted laser pulses |
| title_full_unstemmed |
Interference of electron wave packets in atomic ionization by subcycle sculpted laser pulses |
| title_sort |
interference of electron wave packets in atomic ionization by subcycle sculpted laser pulses |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v89_n4_p_Arbo http://hdl.handle.net/20.500.12110/paper_10502947_v89_n4_p_Arbo |
| _version_ |
1768542899602980864 |