中国物理B ›› 2019, Vol. 28 ›› Issue (9): 94212-094212.doi: 10.1088/1674-1056/ab37fa

所属专题: SPECIAL TOPIC — Optical field manipulation

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

Yue Guo(郭月), Aihua Liu(刘爱华), Jun Wang(王俊), Xueshen Liu(刘学深)   

  1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
  • 收稿日期:2019-06-18 修回日期:2019-07-22 出版日期:2019-09-05 发布日期:2019-09-05
  • 通讯作者: Aihua Liu, Aihua Liu E-mail:aihualiu@jlu.edu.cn;wangjun86@jlu.edu.cn
  • 基金资助:

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

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

Yue Guo(郭月), Aihua Liu(刘爱华), Jun Wang(王俊), Xueshen Liu(刘学深)   

  1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
  • Received:2019-06-18 Revised:2019-07-22 Online:2019-09-05 Published:2019-09-05
  • Contact: Aihua Liu, Aihua Liu E-mail:aihualiu@jlu.edu.cn;wangjun86@jlu.edu.cn
  • Supported by:

    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.

关键词: even-harmonic generation, symmetry-breaking, inhomogeneous field

Abstract:

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.

Key words: even-harmonic generation, symmetry-breaking, inhomogeneous field

中图分类号:  (Ultrafast processes; optical pulse generation and pulse compression)

  • 42.65.Re
33.20.Xx (Spectra induced by strong-field or attosecond laser irradiation)