Calibration of quantitative rescattering model for simulating vortex high-order harmonic generation driven by Laguerre–Gaussian beam with nonzero orbital angular momentum  

作　　者：韩嘉鑫 管仲 汪倍羽 金成 Jiaxin Han;Zhong Guan;Beiyu Wang;Cheng Jin(Department of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China;MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]Department of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China [2]MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing,Nanjing University of Science and Technology,Nanjing 210094,China

出　　处：《Chinese Physics B》2023年第12期98-107,共10页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.12274230,91950102,and 11834004);the Funding of Nanjing University of Science and Technology (Grant No.TSXK2022D005);the Postgraduate Research&Practice Innovation Program of Jiangsu Province of China (Grant No.KYCX230443)。

摘　　要：We calibrate the macroscopic vortex high-order harmonic generation(HHG)obtained by the quantitative rescattering(QRS)model to compute single-atom induced dipoles against that by solving the time-dependent Schr?dinger equation(TDSE).We show that the QRS perfectly agrees with the TDSE under the favorable phase-matching condition,and the QRS can accurately predict the main features in the spatial profiles of vortex HHG if the phase-matching condition is not good.We uncover that harmonic emissions from short and long trajectories are adjusted by the phase-matching condition through the time-frequency analysis and the QRS can simulate the vortex HHG accurately only when the interference between two trajectories is absent.This work confirms that it is an efficient way to employ the QRS model in the single-atom response for precisely simulating the macroscopic vortex HHG.

关 键 词：high-order harmonic generation quantitative rescattering model time-dependent Schr?dinger equation macroscopic propagation orbital angular momentum Laguerre–Gaussian beam 

分 类 号：O436[机械工程—光学工程]