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

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。

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

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.