All-optical control of high-order harmonic generation in correlated systems  

作　　者：YANG WANG JINGSONG GAO YU LIU PENGZUO JIANG JINGYING XIAO ZHUOYAN ZHOU HONG YANG GUOWEI LU LIANG-YOU PENG YUNQUAN LIU QIHUANG GONG CHENGYIN WU 

机构地区：[1]State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics,School of Physics,Peking University,Beijing 100871,China [2]Collaborative Innovation Center of Quantum Matter,Beijing 100871,China [3]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [4]Peking University Yangtze Delta Institute of Optoelectronics,Nantong 226010,China

出　　处：《Photonics Research》2024年第12期2831-2837,共7页光子学研究(英文版)

基　　金：National Key Research and Development Program of China(2022YFA1604301,2023YFA1406801);National Natural Science Foundation of China(12174011,12404393,92250305).

摘　　要：Solid-state high-order harmonic generation(HHG)presents a promising approach for achieving controllable broadband coherent light sources and dynamically detecting materials.In this study,we demonstrate the alloptical control of HHG in a strongly correlated system,vanadium dioxide(VO2),through photo-carrier doping.It has been discovered that HHG can be efficiently modified using a pump laser,achieving modulation depths approaching 100%(extinction ratio≥40 dB)on femtosecond timescales.Quantitative analysis reveals that the driving forces behind pump-dependent HHG are attributed to two distinct many-body dynamics:the scatteringinduced dephasing and the insulator-to-metal transition(IMT)caused by photo-induced electron shielding.These two dynamics play a crucial role in defining the intensity and transient response of the HHG.Furthermore,we demonstrate that it is possible to quantitatively extract the metallic phase fraction from time-resolved HHG(tr-HHG)signals throughout the IMT.This study highlights the benefits of utilizing many-body dynamics for controlling HHG and underscores the necessity for further theoretical research on HHG in strongly correlated systems.

关 键 词：HARMONIC utilizing APPROACHING 

分 类 号：O469[理学—凝聚态物理]