从材料应变到光子辐射:解析晶体内电子结构新方法  

From strain engineering of material to photon radiation: a new perspective for investigating crystal microstructure and electronic structure

作　　者：何峰 HE Feng(School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 201800,China)

机构地区：[1]上海交通大学物理与天文学院,上海201800

出　　处：《中国科学：物理学、力学、天文学》2020年第8期154-156,共3页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:11925405)资助项目。

摘　　要：超短强激光脉冲作用于晶体材料可驱动若干非线性光学过程,例如高次谐波辐射.理论研究发现,对材料进行应变调控,谐波频谱的效率和奇偶次特性随之被调制.由于高次谐波辐射频谱携带着靶材结构和电子动力学信息,笔者认为固体谐波将成为解析晶体内部电子结构的新方法.Many nonlinear optical scenarios,including the typical high-order harmonic radiation,can be initiated in crystals exposed to ultrashort strong lasers.According to the recent theoretical calculation,the high-order harmonic radiation can be modulated by exerting the strain on a monolayer aluminum nitride.Since the high-order harmonic spectra carry the structural information of the target,inversely,the radiated spectra can be used to extract the microstructure of the target and even the ultrafast electron dynamics.

关 键 词：应变 高次谐波 相干 能带结构 

分 类 号：TN24[电子电信—物理电子学] O734[理学—晶体学]