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High efficient terahertz generation from cryogenic gallium phosphide based on collinear difference frequency
Author(s): Jingguo Huang; Yang Li; Yanqing Gao; Gaofang Li; Zhiming Huang; Junhao Chu; Yury Andreev
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Paper Abstract

In this paper, a high efficient terahertz source based on n-type gallium phosphide crystal via cryogenic process is investigated through collinear difference frequency generation pumper by 1064 nm Nd:YAG laser and its OPO system. Absorption coefficient of this crystal at THz range shows a dramatic decrease from ~ 50 cm-1 to 0.5 cm--1 as the temperature decreases from 300 k to 80 k. Four times enhancement of the terahertz emission power and much more broad spectra range (~ 0.2- 3.8 THz) has been achieved in this kind of 0.5 mm length gallium phosphide crystal during the whole varied temperature difference frequency generation from 300 k to 80 k. These results indicate that cooling down the crystal temperature is an effective way to improve the terahertz source property, such as terahertz output power and frequency range.

Paper Details

Date Published: 29 March 2019
PDF: 7 pages
Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 1104631 (29 March 2019); doi: 10.1117/12.2524100
Show Author Affiliations
Jingguo Huang, Shanghai Institute of Technical Physics (China)
Yang Li, Shanghai Institute of Technical Physics (China)
Yanqing Gao, Shanghai Institute of Technical Physics (China)
Gaofang Li, Shanghai Institute of Technical Physics (China)
Zhiming Huang, Shanghai Institute of Technical Physics (China)
Junhao Chu, Shanghai Institute of Technical Physics (China)
Yury Andreev, Institute of Monitoring of Climate and Ecological Systems (Russian Federation)


Published in SPIE Proceedings Vol. 11046:
Fifth International Symposium on Laser Interaction with Matter
YiJun Zhao, Editor(s)

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