标题： 光电子发射在C$_{60}$中由少周期激光脉冲激发的正向-反向不对称性 显示英文标题

标题： Forward-backward asymmetry of photoemission in C$_{60}$ excited by few-cycle laser pulses

摘要： 我们理论分析了由C$_{60}$与强而短的激光脉冲相互作用产生的角度分辨光电子谱（ARPES）。 特别是，我们关注载波包络相位（CEP）对角分布的影响。 电子动力学由时变密度泛函理论描述，$\csixty$的离子背景通过一个特别设计的jellium模型进行近似。 我们的结果表明，对于仅覆盖很少激光周期的非常短脉冲，角分布明显依赖于CEP，而对于更长的脉冲则消失。 对于最近实验中使用的特定激光参数，获得了非常好的一致性。 此外，发现这种不对称性取决于发射光电子的能量。 电子发射的角不对称性对CEP和脉冲持续时间的强烈影响表明，可以利用这种敏感性作为分析少周期激光脉冲结构的手段。 显示英文摘要

摘要： We theoretically analyze angle-resolved photo-electron spectra (ARPES) generated by the interaction of C$_{60}$ with intense, short laser pulses. In particular, we focus on the impact of the carrier-envelope phase (CEP) onto the angular distribution. The electronic dynamics is described by time-dependent density functional theory, and the ionic background of $\csixty$ is approximated by a particularly designed jellium model. Our results show a clear dependence of the angular distributions onto the CEP for very short pulses covering only very few laser cycles, which disappears for longer pulses. For the specific laser parameters used in a recent experiments, a very good agreement is obtained. Furthermore, the asymmetry is found to depend on the energy of the emitted photoelectrons. The strong influence of the angular asymmetry of electron emission onto the CEP and pulse duration suggests to use this sensitivity as a means to analyze the structure of few-cycle laser pulses.