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

Minghu Yuan; Dandan Wang; Junsheng Chen; Aiping Fu; Fenghui Tian; Tianshu Chu

doi:10.1139/cjp-2014-0336

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

Minghu Yuan, Dandan Wang, Junsheng Chen, Aiping Fu, Fenghui Tian, Tianshu Chu^*

^*Corresponding author af dette arbejde

Kemisk Institut

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

3 Citationer (Scopus)

Abstract

The above-threshold ionization (ATI) process of argon in intensive circularly polarized laser field has been investigated by solving the time-dependent Schrödinger 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.

Originalsprog	Engelsk
Tidsskrift	Canadian Journal of Physics
Vol/bind	93
Udgave nummer	1
Sider (fra-til)	93-99
Antal sider	7
ISSN	0008-4204
DOI	https://doi.org/10.1139/cjp-2014-0336
Status	Udgivet - 22 dec. 2014

Bibliografisk note

Publisher Copyright:
© 2014 Published by NRC Research Press.

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Citationsformater

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abstract = "The above-threshold ionization (ATI) process of argon in intensive circularly polarized laser field has been investigated by solving the time-dependent Schr{\"o}dinger 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.",

author = "Minghu Yuan and Dandan Wang and Junsheng Chen and Aiping Fu and Fenghui Tian and Tianshu Chu",

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T1 - Influence of pulse duration on above-threshold ionization in intensive circularly polarized laser field

AU - Yuan, Minghu

AU - Wang, Dandan

AU - Chen, Junsheng

AU - Fu, Aiping

AU - Tian, Fenghui

AU - Chu, Tianshu

PY - 2014/12/22

Y1 - 2014/12/22

N2 - The above-threshold ionization (ATI) process of argon in intensive circularly polarized laser field has been investigated by solving the time-dependent Schrödinger 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.

AB - The above-threshold ionization (ATI) process of argon in intensive circularly polarized laser field has been investigated by solving the time-dependent Schrödinger 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.

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JO - Canadian Journal of Physics

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