Enhanced ionization of hydrogen molecular ions in an intense laser field via a multiphoton resonance

被引：14

作者：

Jin, Ying-Jun ^{[1
]}

Tong, Xiao-Min ^{[1
,2
]}

Toshima, Nobuyuki ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Mat Sci, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058573, Japan

[2] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 3058577, Japan

来源：

PHYSICAL REVIEW A | 2010年 / 81卷 / 01期

基金：

日本学术振兴会;

关键词：

DETACHMENT; THRESHOLD; DYNAMICS; H-2(+);

D O I：

10.1103/PhysRevA.81.013408

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Multiphoton ionization of hydrogen molecular ions in a 480-nm intense laser field is investigated by solving the time-dependent Schrodinger equation numerically in prolate spheroidal coordinates. We discretize space on a generalized pseudospectral grid and propagate the electronic wave function using a second-order split-operator method. By including and excluding the 2p sigma(u) state in the basis expansion, we confirm that the observed 10-eV peak in a recent experiment [Litvinyuk et al., New J. Phys. 10, 083011 (2008)] comes from the enhanced ionization via three-photon resonant excitation of the molecular ions. By folding the calculated ionization rates with the vibrational density distribution, the kinetic energy release spectra are obtained, which are in reasonable agreement with the experimental measurement. Furthermore, using this enhanced ionization, a pump-probe experiment is suggested to trace the vibrational wave packet.

引用

页数：6

共 24 条

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