Influence of pulse duration on above-threshold ionization in intensive circularly polarized laser field

被引：2
|
作者：
Yuan, Minghu [1 ]
Wang, Dandan [1 ]
Chen, Junsheng [1 ]
Fu, Aiping [2 ]
Tian, Fenghui [2 ]
Chu, Tianshu [1 ,2 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
[2] Qingdao Univ, Inst Computat Sci & Engn, Lab New Fiber Mat & Modern Text, Growing Base State Key Lab, Qingdao 266071, Peoples R China
来源：
CANADIAN JOURNAL OF PHYSICS | 2015年 / 93卷 / 01期
基金：
中国国家自然科学基金;
关键词：
MULTIPHOTON IONIZATION; REACTIVE SCATTERING; WAVE; ATOMS;
D O I：
10.1139/cjp-2014-0336
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The above-threshold ionization (ATI) process of argon in intensive circularly polarized laser field has been investigated by solving the time-dependent Schrodinger equation in length gauge with emphasis on pulse duration effect. It is shown that the influence of pulse duration is obvious on the transition between multiple-photon and tunneling ionization regimes when the Keldysh parameter is no more than 3.25. That is, photoelectron ionization by shorter pulse occurs in the tunneling regime mainly, and yet the multiple-photon absorption appears more easily with longer pulse. However, such influence disappears when the Keldysh parameter is sufficiently large and the ATI always appears in the multiple-photon ionization regime.
引用
收藏
页码：93 / 99
页数：7
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