量子电子学报, 2011, 28 (2): 136, 网络出版: 2011-03-28  

超快强激光场中离子的光离解:光电离标度规律的一个验证

Photodetachment of ions in ultrafast strong laser fields: a test of scaling law of photoionization
作者单位
上海大学物理系,上海 200444
摘要
在量子电动力学框架下,采用全量子非微扰散射理论,研究了超快强激光场中离子的光离解。 发现在保持周期数与载波-包络相位不变时,对相同的阈上离解峰,当用频率为γ 倍,强度为γ3倍的激光激发结合能为γ 倍的离子时,光电子的角分布不变, γ 为任意正实数。这一研究验证了周期量级超短激光脉冲中光电离的标度规律。
Abstract
Under the frame of quantum electrodynamics, by using a nonperturbative quantum scattering theory, photodetachment of ions in ultrafast strong laser fields was investigated. It was found that for the same above-detachment peaks, with the cycle number and carrier-envelope phase constant, when ions with γ times of binding energy were irradiated by γ times of frequency and γ3 times of laser intensity, angular distributions of photoelectrons didn’t change, where γ was arbitrary positive real number. The results verifies the scaling law of photoionization in few-cycle laser pulses.

白丽华, 侯路强, 崔婷婷, 刘宇恒, 王燕, 阎晓娜. 超快强激光场中离子的光离解:光电离标度规律的一个验证[J]. 量子电子学报, 2011, 28(2): 136. BAI Li-hua, HOU Lu-qiang, CUI Ting-ting, LIU Yu-heng, WANG Yan, YAN Xiao-na. Photodetachment of ions in ultrafast strong laser fields: a test of scaling law of photoionization[J]. Chinese Journal of Quantum Electronics, 2011, 28(2): 136.

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