华中科技大学学报（自然科学版）2025，Vol.53Issue(9)：1-10,10.DOI:10.13245/j.hust.250717
极性分子强场超快电离动力学理论研究进展
Advances in theoretical studies on strong-field ultrafast ionization dynamics of polar molecules
摘要
Abstract
A model which considers both the Coulomb effect and the permanent dipole effect was introduced.Using this model,the asymmetry of the photoelectron momentum distribution of polar molecules under linearly polarized laser field was explained.The permanent dipole effect induces asymmetric ionization between two consecutive half-cycles,while the asymmetric Coulomb effect further leads to the asymmetry in the photoelectron momentum distribution.Furthermore,by applying this model and analyzing the weight ratios of momentum distributions in different quadrants under an orthogonal two-color laser fields,the ionization channels of ground were resolved,the states of polar molecules at the sub-cycle level were excited and the information on Coulomb-induced ionization time delays was extracted.A Coulomb-corrected attoclock scheme was introduced,which enables the extraction of sub-cycle ionization time delays in polar molecules and distinguishes the influence of the permanent dipolen effect through relative ionization time delays.关键词
极性分子/强场电离/固有偶极/不对称电离/光电子动量分布/阿秒探测Key words
polar molecule/strong field ionization/permanent dipole/asymmetric ionization/photoelectron momentum distribution/attosecond detection分类
数理科学引用本文复制引用
陈彦军,张春艳,车佳殷,王赏..极性分子强场超快电离动力学理论研究进展[J].华中科技大学学报（自然科学版）,2025,53(9):1-10,10.基金项目
国家自然科学基金资助项目(12174239,12347165,12404330). （12174239,12347165,12404330）
