標題: Photodissociation of H-2(+) in intense chirped laser fields
作者: Lin, JT
Jiang, TF
物理研究所
Institute of Physics
公開日期: 1-Jan-2001
摘要: Regarding an experimental measurement of proton kinetic energy spectra of H-2(+) with a chirped pulse [L. J. Frasinski, J. H. Posthumus, J. Plumridge, and K. Golding, Phys. Rev. Lett. 83, 3625 (1999)], we present a nonperturbative, time-dependent calculation for the photodissociation of H-2(+) in intense laser fields by combining three numerical techniques. The results show a finer kinetic-energy distribution structure of a proton due to the intrapulse pump-dump mechanism between two electronic states as the pulse duration and intensity change. Higher-energy peaks are also suppressed by frequency chirping of the laser field. The dissociation probabilities show that a positively chirped pulse is always more efficient for population inversion than no chirping or negatively chirped pulses, and a slight coordinate shift of the initial state could result in a significant increase of dissociation probability.
URI: http://hdl.handle.net/11536/30005
ISSN: 1050-2947
期刊: PHYSICAL REVIEW A
Volume: 63
Issue: 1
結束頁: 
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