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Title: Driving-laser wavelength dependence of high-order harmonic generation in H{sub 2}{sup +} molecules

Abstract

The electron-nuclear dynamics of one-dimensional H{sub 2}{sup +} molecular high harmonic generation is investigated by numerical integration of the non-Born-Oppenheimer time-dependent Schroedinger equation. It is found that the nuclear motion and electron ionization are more significant for the longer wavelength and the stronger intensity of the driving laser pulse. When the ground-state H{sub 2}{sup +} molecule is driven by a short laser pulse (ten optical cycles in the calculations), a strong signature of nuclear motion is seen in the wavelength scaling (800-2000 nm) of harmonic yield, following a {lambda}{sup -(7-8)} scaling law at a constant laser intensity. It is attributed to the fast ground-state depletion induced by the strong nuclear motion, when using the long wavelength. Consequently, the wavelength scaling gives an insight into the nuclear dynamics.

Authors:
; ; ; ; ;  [1]
  1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)
Publication Date:
OSTI Identifier:
21408460
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 81; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.81.033426; (c) 2010 The American Physical Society; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; BORN-OPPENHEIMER APPROXIMATION; ELECTRONS; FREQUENCY DEPENDENCE; GROUND STATES; HARMONIC GENERATION; HYDROGEN IONS 2 PLUS; IONIZATION; LASERS; MOLECULES; PULSES; SCALING LAWS; SCHROEDINGER EQUATION; TIME DEPENDENCE; WAVELENGTHS; APPROXIMATIONS; CALCULATION METHODS; CATIONS; CHARGED PARTICLES; DIFFERENTIAL EQUATIONS; ELEMENTARY PARTICLES; ENERGY LEVELS; EQUATIONS; FERMIONS; FREQUENCY MIXING; HYDROGEN IONS; IONS; LEPTONS; MOLECULAR IONS; PARTIAL DIFFERENTIAL EQUATIONS; WAVE EQUATIONS

Citation Formats

Candong, Liu, Zhinan, Zeng, Pengfei, Wei, Peng, Liu, Ruxin, Li, and Zhizhan, Xu. Driving-laser wavelength dependence of high-order harmonic generation in H{sub 2}{sup +} molecules. United States: N. p., 2010. Web. doi:10.1103/PHYSREVA.81.033426.
Candong, Liu, Zhinan, Zeng, Pengfei, Wei, Peng, Liu, Ruxin, Li, & Zhizhan, Xu. Driving-laser wavelength dependence of high-order harmonic generation in H{sub 2}{sup +} molecules. United States. doi:10.1103/PHYSREVA.81.033426.
Candong, Liu, Zhinan, Zeng, Pengfei, Wei, Peng, Liu, Ruxin, Li, and Zhizhan, Xu. Mon . "Driving-laser wavelength dependence of high-order harmonic generation in H{sub 2}{sup +} molecules". United States. doi:10.1103/PHYSREVA.81.033426.
@article{osti_21408460,
title = {Driving-laser wavelength dependence of high-order harmonic generation in H{sub 2}{sup +} molecules},
author = {Candong, Liu and Zhinan, Zeng and Pengfei, Wei and Peng, Liu and Ruxin, Li and Zhizhan, Xu},
abstractNote = {The electron-nuclear dynamics of one-dimensional H{sub 2}{sup +} molecular high harmonic generation is investigated by numerical integration of the non-Born-Oppenheimer time-dependent Schroedinger equation. It is found that the nuclear motion and electron ionization are more significant for the longer wavelength and the stronger intensity of the driving laser pulse. When the ground-state H{sub 2}{sup +} molecule is driven by a short laser pulse (ten optical cycles in the calculations), a strong signature of nuclear motion is seen in the wavelength scaling (800-2000 nm) of harmonic yield, following a {lambda}{sup -(7-8)} scaling law at a constant laser intensity. It is attributed to the fast ground-state depletion induced by the strong nuclear motion, when using the long wavelength. Consequently, the wavelength scaling gives an insight into the nuclear dynamics.},
doi = {10.1103/PHYSREVA.81.033426},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 81,
place = {United States},
year = {2010},
month = {3}
}