Phase control of multichannel molecular high-order harmonic generation by the asymmetric diatomic molecule HeH{sup 2+} in two-color laser fields

Journal Article · Tue Feb 15 00:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.023414· OSTI ID:21537181

Xuebin, Bian; Bandrauk, Andre D ^[1]

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1. Departement de Chimie, Universite de Sherbrooke, Sherbrooke, Quebec J1K 2R1 (Canada)

Multichannel molecular high-order harmonic generation (MHOHG) from the asymmetric diatomic molecule HeH{sup 2+} in two-color laser fields is investigated from numerical simulation of the corresponding time-dependent Schroedinger equation (TDSE). It is found that the laser-induced electron transfer (LIET) plays a crucial role in MHOHG, which leads to the multichannel harmonic generation from the ground and long-lifetime excited states. LIET is sensitive to the phase differences of the two-color laser pulses, which can be used to control the enhanced excitation (EE) and enhanced ionization (EI) of the system. Both EE and EI have a strong influence on the overall intensity of the MHOHG spectrum, and there may be four orders of magnitude difference in the MHOHG intensity between the enhanced and suppressed cases. In addition, owing to the asymmetry of the two-color laser fields and the recombination of electron with the neighboring ion, multiple cutoff energies are observed. The mechanism of these effects are confirmed by classical simulations.

• OSTI ID: 21537181
• Journal Information: Physical Review. A, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevA.83.023414; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
COLOR
COMPUTERIZED SIMULATION
CONTROL
ELECTRON TRANSFER
ELECTRONS
EXCITATION
EXCITED STATES
HARMONIC GENERATION
IONIZATION
LASER RADIATION
LIFETIME
MOLECULES
PHASE STABILITY
PULSES
RECOMBINATION
SCHROEDINGER EQUATION
TIME DEPENDENCE
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EQUATIONS
FERMIONS
FREQUENCY MIXING
LEPTONS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
RADIATIONS
SIMULATION
STABILITY
WAVE EQUATIONS