J4 ›› 2011, Vol. 28 ›› Issue (2): 136-141.

• 第二届全国光学青年学术论坛论文选登 • 上一篇    下一篇

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

白丽华,侯路强,崔婷婷,刘宇恒,王燕,阎晓娜   

  1. 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

Photodetachment of ions in ultrafast strong laser fields: a test of scaling law of photoionization

BAI Li-hua, HOU Lu-qiang, CUI Ting-ting, Liu Yu-heng, WANG Yan, Yan Xiao-na   

  1. Department of Physics, Shanghai University, Shanghai 200444, China
  • Published:2011-03-28 Online:2011-03-03

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γ 3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。

关键词: 非线性光学, 光离解, 非微扰全量子散射理论, 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. The study verifies the scaling law of photoionization in few-cycle laser pulses.

Key words: nonlinear optics, photodetachment, nonperturbative quantum scattering theory, scaling law

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