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

doi:10.1088/1674-1056/ab37fa

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.

Keywords: even-harmonic generation symmetry-breaking inhomogeneous field

Received: 18 June 2019
Revised: 22 July 2019
Accepted manuscript online:

PACS:	42.65.Re	(Ultrafast processes; optical pulse generation and pulse compression)
	33.20.Xx	(Spectra induced by strong-field or attosecond laser irradiation)

Fund:

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

Corresponding Authors: Aihua Liu, Aihua Liu
E-mail: aihualiu@jlu.edu.cn;wangjun86@jlu.edu.cn

Cite this article:

Yue Guo(郭月), Aihua Liu(刘爱华), Jun Wang(王俊), Xueshen Liu(刘学深) Atomic even-harmonic generation due to symmetry-breaking effects induced by spatially inhomogeneous field 2019 Chin. Phys. B 28 094212

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

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