Wavelength and intensity effects on the dissociation of H2+ in intense laser fields

被引：5

作者：

Hu, Hongtao ^{[1
,2
]}

Xu, Han ^{[3
]}

Bai, Ya ^{[1
]}

Sang, R. T. ^{[3
]}

Litvinyuk, Igor V. ^{[3
]}

Liu, Peng ^{[1
,4
]}

Li, Ruxin ^{[1
,4
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Griffith Univ, Ctr Quantum Dynam, Nathan, Qld 4111, Australia

[4] Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA CICIFSA, Shanghai 200240, Peoples R China

来源：

PHYSICAL REVIEW A | 2016年 / 94卷 / 05期

基金：

中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

ABOVE-THRESHOLD-DISSOCIATION; PROBING MOLECULAR-DYNAMICS; COULOMB EXPLOSION; ENHANCED IONIZATION; PULSES; IONS; PHOTODISSOCIATION; FEMTOSECOND; 2-COLOR; H-2+;

D O I：

10.1103/PhysRevA.94.053415

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on a systematic investigation of the dissociation dynamics of H-2(+) in intense laser fields, and study how the kinetic energy spectrum of the dissociating proton can be modulated by the wavelength and intensity of the driving laser field. In the experiment, H-2 is dissociatively ionized by an intense laser pulse with varying carrier wavelengths ranging from 800 to 1800 nm and varying peak intensities. A model based on Floquet theory and Landau-Zener theory is adopted to explain the experimental observations. The intensity effect is further explored in a few-cycle pump-probe experiment. We observed a significant intensity-dependent proton kinetic energy shift, which can also be well explained by the theoretical simulation. The wavelength- and intensity-dependent proton spectra reveal the mechanism of selective excitation of vibrational levels of H-2(+) in intense laser fields.

引用

页数：6

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