Giant Nonlinear Optical Response in Topological Semimetal Molybdenum Phosphide  

作　　者：胡凯 秦羽婕 程亮 石友国 齐静波 Kai Hu;Yujie Qin;Liang Cheng;Youguo Shi;Jingbo Qi(State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 610054,China;Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 610054,China [2]Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Physics Letters》2023年第11期53-56,共4页中国物理快报（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2022YFA1403000);the National Natural Science Foundation of China(Grant Nos.11974070,92365102,11974306,12034017,11734006,and 11774401)。

摘　　要：Nonlinear optical properties are investigated using the static and time-resolved second harmonic generation in the topological material molybdenum phosphide(Mo P) with three-component fermions.Giant second harmonic generation signals are detected and the derived χ^((2)) value is larger than that of the typical electro–optic material.Upon optical excitation,no photoinduced change of the symmetry is detected in MoP,which is quite different from previous observations in several other topological materials.

关 键 词：MATERIALS MATERIAL NONLINEAR 

分 类 号：O469[理学—凝聚态物理] O437[理学—电子物理学]