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Title: Angle-dependent molecular above-threshold ionization with ultrashort intense linearly and circularly polarized laser pulses

Abstract

We present molecular above-threshold ionization (MATI) spectra generated by ultrashort intense linearly and circularly polarized laser pulses from nonperturbative numerical solutions of the corresponding time-dependent Schroedinger equation in the molecular-ion H{sub 2}{sup +}. It is found that high-order MATI spectra with maximum kinetic energy 32U{sub p}, where U{sub p}=I{sub 0}/4m{sub e}{omega}{sub 0}{sup 2} is the ponderomotive energy at intensity I{sub 0} and frequency {omega}{sub 0}, can be obtained in H{sub 2}{sup +} at great internuclear distances R for both linear and circular polarizations. Quasiclassical laser-induced collision models confirm that such high-order MATIs mainly result from a collision with neighboring ions of the ionized electron. Interference patterns in the high-order MATI spectra are critically sensitive to both the internuclear distance R of the molecules and the polarizations of the driving laser pulses. Moreover, with few-cycle laser pulses, the carrier-envelope phase sensitivity of MATI angular distributions is also investigated for varying internuclear distances R. At critical internuclear distances for charge-resonance-enhanced ionization, we also find that enhanced interference patterns occur.

Authors:
;  [1]
  1. Laboratoire de Chimie Theorique, Faculte des Sciences, Universite de Sherbrooke, Sherbrooke, Quebec, J1K 2R1 (Canada)
Publication Date:
OSTI Identifier:
22051337
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANGULAR DISTRIBUTION; HYDROGEN IONS 2 PLUS; INTERFERENCE; IONIZATION; KINETIC ENERGY; LASERS; MOLECULES; NUMERICAL SOLUTION; POLARIZATION; PONDEROMOTIVE FORCE; PULSES; RESONANCE; SCHROEDINGER EQUATION; SPECTRA; TIME DEPENDENCE

Citation Formats

Yuan, Kai-Jun, and Bandrauk, Andre D. Angle-dependent molecular above-threshold ionization with ultrashort intense linearly and circularly polarized laser pulses. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.013426.
Yuan, Kai-Jun, & Bandrauk, Andre D. Angle-dependent molecular above-threshold ionization with ultrashort intense linearly and circularly polarized laser pulses. United States. doi:10.1103/PHYSREVA.84.013426.
Yuan, Kai-Jun, and Bandrauk, Andre D. Fri . "Angle-dependent molecular above-threshold ionization with ultrashort intense linearly and circularly polarized laser pulses". United States. doi:10.1103/PHYSREVA.84.013426.
@article{osti_22051337,
title = {Angle-dependent molecular above-threshold ionization with ultrashort intense linearly and circularly polarized laser pulses},
author = {Yuan, Kai-Jun and Bandrauk, Andre D.},
abstractNote = {We present molecular above-threshold ionization (MATI) spectra generated by ultrashort intense linearly and circularly polarized laser pulses from nonperturbative numerical solutions of the corresponding time-dependent Schroedinger equation in the molecular-ion H{sub 2}{sup +}. It is found that high-order MATI spectra with maximum kinetic energy 32U{sub p}, where U{sub p}=I{sub 0}/4m{sub e}{omega}{sub 0}{sup 2} is the ponderomotive energy at intensity I{sub 0} and frequency {omega}{sub 0}, can be obtained in H{sub 2}{sup +} at great internuclear distances R for both linear and circular polarizations. Quasiclassical laser-induced collision models confirm that such high-order MATIs mainly result from a collision with neighboring ions of the ionized electron. Interference patterns in the high-order MATI spectra are critically sensitive to both the internuclear distance R of the molecules and the polarizations of the driving laser pulses. Moreover, with few-cycle laser pulses, the carrier-envelope phase sensitivity of MATI angular distributions is also investigated for varying internuclear distances R. At critical internuclear distances for charge-resonance-enhanced ionization, we also find that enhanced interference patterns occur.},
doi = {10.1103/PHYSREVA.84.013426},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}