周期量级激光脉冲中里德堡原子光电离的不对称性

J4 ›› 2011, Vol. 28 ›› Issue (2): 129-135.

• 第二届全国光学青年学术论坛论文选登 • 下一篇

周期量级激光脉冲中里德堡原子光电离的不对称性

白丽华,崔婷婷,侯路强,王燕,张惠芳

上海大学物理系，上海 200444

出版日期:2011-03-28 发布日期:2011-03-03
通讯作者: 白丽华 (1976- ), 上海，讲师，博士，从事强场激光与物质的相互作用研究与教学。 E-mail:lhbai@163.com
基金资助:
国家自然科学基金资助（60908006 , 10804067），上海大学创新基金资助

Asymmetry in photoelectron angular distributions of Rydberg atoms in circularly polarized few-cycle laser pulses

BAI Li-hua, CUI Ting-ting, HOU Lu-qiang, WANG Yan, ZHANG Hui-fang

Department of Physics, Shanghai University, Shanghai 200444, China

Published:2011-03-28 Online:2011-03-03

摘要/Abstract

摘要：

采用全量子非微扰散射理论，研究了周期量级微波频率激光脉冲中高激发里德堡态铷原子光电离的不对称现象。发现了光电子角分布的不对称性，这一不对称性由电离过程中不同跃迁通道之间的干涉引起。讨论了光电子角分布的不对称性对载波-包络（Carrier-Envelo?pe , CE）相位、脉冲宽度及光电子能量的依赖性，发现光电子角分布的不对称性随CE相位、脉冲宽度及光电子能量的变化有显著变化。这一研究证实了最近的实验观测，为微波频率光学范畴内CE相位的测量及光电子角分布的控制提供了一种有效的方法。

关键词: 光谱学, 光电离, 非微扰全量子散射理论, 周期量级激光脉冲

Abstract:

By using a quantum nonperturbative scattering theory, asymmetry in photoionization of high Rydberg states of rubidium atoms in circularly polarized few-cycle microwave frequency laser pulses was investigated. Asymmetry in photoelectron angular distributions was found. The asymmetry is caused by the quantum coherence of different transition channels. Dependence of the asymmetry on carrier-envelope (CE）phase, the pulse duration, and the photoelectron’s energy was discussed. It is found that the asymmetry varies with the CE phase, the pulse duration, and the photoelectron’s energy dramatically. This study confirms the recent experimental finding. It provides an effective means to measure the CE phase and to control the photoelectron angular distributions in microwave frequency optical regime.

Key words: spectroscopy, photoionization, nonperturbative quantum scattering theory, few-cycle laser pulses

中图分类号:

O433.5

白丽华,崔婷婷,侯路强,王燕,张惠芳. 周期量级激光脉冲中里德堡原子光电离的不对称性[J]. J4, 2011, 28(2): 129-135.

BAI Li-hua, CUI Ting-ting, HOU Lu-qiang, WANG Yan, ZHANG Hui-fang. Asymmetry in photoelectron angular distributions of Rydberg atoms in circularly polarized few-cycle laser pulses[J]. J4, 2011, 28(2): 129-135.

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周期量级激光脉冲中里德堡原子光电离的不对称性

Asymmetry in photoelectron angular distributions of Rydberg atoms in circularly polarized few-cycle laser pulses

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