论文标题
使用最佳控制理论增加飞秒光电子化的离子产量圆二色性
Increasing ion yield circular dichroism in femtosecond photoionisation using optimal control theory
论文作者
论文摘要
我们研究了如何使用最佳控制理论来改善通过光（通过光电离能量）进一步激发测量的fenchone的圆二色性（CD）信号。这些过渡是禁止进行一阶的电偶极子，这转化为较低的人口转移到激发态（〜8％），但也允许在电气和磁过渡偶极矩之间进行更清晰的相互作用，该偶极矩具有相同的数量级。使用包括电子基础并激发状态以及所有永久和过渡多多的模型，直至电动四极杆，我们发现，当使用形状的激光脉冲时，可以增加一个因子3.5的绝对CD信号，并通过对我们的洞察力的进一步提供良好的依赖性来增加。永久性和过渡多重力矩的相互作用。
We investigate how optimal control theory can be used to improve Circular Dichroism (CD) signals for A--band of fenchone measured via the photoionization yield upon further excitation. These transitions are electric dipole forbidden to first order, which translates into low population transfer to the excited state (~8%) but also allows for a clearer interplay between electric and magnetic transition dipole moments, which are of the same order of magnitude. Using a model including the electronic ground and excited A state as well as all permanent and transition multipole moments up to the electric quadrupole, we find that the absolute CD signal of randomly oriented molecules can be increased by a factor 3.5 when using shaped laser pulses, with the anisotropy parameter g increasing from 0.06 to 1. Our insights provide additional evidence on how optimal control can assist in amplifying chiral signatures via interactions of permanent and transition multipole moments.
