Power dependence of terahertz carrier frequency in a plasma-based two-color generation process

doi:10.1088/1674-1056/23/12/127201

Abstract We conduct a frequency spectrum experiment to investigate terahertz (THz) emissions from laser-induced air plasma under different laser incident powers. The frequency spectra are measured using both air-biased-coherent detection and a Michelson interferometer. The red-shift of the THz pulse carrier frequency is observed as a response to increased pump power. These phenomena are related to plasma collisions and can be explained by the plasma collision model. Based on these findings, it is apparent that the tuning of the THz carrier frequency can be achieved through regulation of the pump beam.

Keywords: terahertz frequency red-shift plasma collision

Received: 13 May 2014
Revised: 12 July 2014
Accepted manuscript online:

PACS:	72.30.+q	(High-frequency effects; plasma effects)
	42.65.Tg	(Optical solitons; nonlinear guided waves)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61377109 and 11374007) and the Support Program for Outstanding Ph. D. Advisors, China (Grant No. YB20101000701).

Corresponding Authors: Zhao Yue-Jin
E-mail: yjzhao@bit.edu.cn

Cite this article:

Zhao Ji (赵骥), Zhang Liang-Liang (张亮亮), Luo Yi-Man (骆怡蔓), Wu Tong (吴同), Zhang Cun-Lin (张存林), Zhao Yue-Jin (赵跃进) Power dependence of terahertz carrier frequency in a plasma-based two-color generation process 2014 Chin. Phys. B 23 127201


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