Background-free detection of molecular chirality using a single-color beam [Invited]  

作　　者：Yuhang Chen Xiaosong Zhu Pengfei Lan Peixiang Lu 陈宇航;祝晓松;兰鹏飞;陆培祥(Wuhan National Laboratory for Optoelectronics and School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China;Optics Valley Laboratory,Wuhan 430074,China)

机构地区：[1]Wuhan National Laboratory for Optoelectronics and School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China [2]Optics Valley Laboratory,Wuhan 430074,China

出　　处：《Chinese Optics Letters》2022年第10期14-19,共6页中国光学快报（英文版）

基　　金：supported by the Science and Technology Planning Project of Guangdong Province(No.2018B090944001);National Natural Science Foundation of China(NSFC)(Nos.12174134,12021004,and 91950202);National Key Research and Development Program of China(No.2019YFA0308300)。

摘　　要：We propose and numerically demonstrate a simple and background-free all-optical chiral spectroscopy technique for gas molecules.Our approach is based on high harmonic generation driven by a new type of laser beam that is produced by one linearly polarized single-color beam passing through a lens and a prism.It is shown that chiral and achiral signals are completely separated in frequency,indicating strong background-free and highly sensitive chirality detection.We believe this all-optical method can open new opportunities for ultrafast detection for chiral dynamics in the femtoseond to attosecond time scale.

关 键 词：high harmonic generation strong-field chiral spectroscopy selection rule 

分 类 号：O43[机械工程—光学工程]