Atomic even-harmonic generation due to symmetry-breaking effects induced by spatially inhomogeneous field  

作　　者：Yue Guo Aihua Liu Jun Wang Xueshen Liu 郭月;刘爱华;王俊;刘学深(Institute of Atomic and Molecular Physics, Jilin University)

机构地区：[1]Institute of Atomic and Molecular Physics, Jilin University

出　　处：《Chinese Physics B》2019年第9期32-36,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.91850114,11774131,11604119,and 11627807)

摘　　要：We ab initio investigate the interaction between the hydrogen atom and the inhomogeneous field which is induced by resonant plasmons within a metal nanostructure.Same as normal laser pulse(homogeneous field), only odd-harmonic generation occurs when the bow-tie nanostructure is utilized.For the single nanotip case, the even-harmonic generation can be distinctly found in the harmonic emission spectrum.By investigating the symmetry and trajectories of different inhomogeneous fields, we demonstrate that the breaking symmetry of system can enable even high harmonic generations.We ab initio investigate the interaction between the hydrogen atom and the inhomogeneous field which is induced by resonant plasmons within a metal nanostructure.Same as normal laser pulse(homogeneous field), only odd-harmonic generation occurs when the bow-tie nanostructure is utilized.For the single nanotip case, the even-harmonic generation can be distinctly found in the harmonic emission spectrum.By investigating the symmetry and trajectories of different inhomogeneous fields, we demonstrate that the breaking symmetry of system can enable even high harmonic generations.

关 键 词：even-harmonic generation SYMMETRY-BREAKING INHOMOGENEOUS FIELD 

分 类 号：O4[理学—物理]