论文标题
激光浅的原子氦的光电子光谱
Photoelectron spectroscopy of laser-dressed atomic helium
论文作者
论文摘要
相对于激光强度依赖性激发能移动和角度分布，分析了激光原子氦激发态的光电发射。在两种颜色的XUV（扩展Ultra \ -Violet） - IR（红外）测量中，XUV光子能量在\ si {20.4} {\ electronvolt}之间进行扫描，而电离阈值在\ si {24.6} （$ \ sim \！\ si {e12} {\ watt \ per \ centi \ meter \ squared} $）。通过在单活动 - 电子近似中求解时间依赖性的schrödinger方程来支持实验结果的解释。
Photoelectron emission from excited states of laser-dressed atomic helium is analyzed with respect to laser intensity-dependent excitation energy shifts and angular distributions. In the two-color XUV (exteme ultra\-violet) -- IR (infrared) measurement, the XUV photon energy is scanned between \SI{20.4}{\electronvolt} and the ionization threshold at \SI{24.6}{\electronvolt}, revealing electric dipole-forbidden transitions for a temporally overlapping IR pulse ($\sim\!\SI{e12}{\watt\per \centi\meter\squared}$). The interpretation of the experimental results is supported by numerically solving the time-dependent Schrödinger equation in a single-active-electron approximation.
