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

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.033426· OSTI ID:21408460

Candong, Liu; Zhinan, Zeng; Pengfei, Wei; Peng, Liu; Ruxin, Li; Zhizhan, Xu ^[1]

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1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)

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.

• OSTI ID: 21408460
• Journal Information: Physical Review. A, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevA.81.033426; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

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