Impact of sulfur doping on broadband terahertz emission in gallium selenide single crystals via optical rectification

Gaofang Li, Renjie Huang, Jingguo Huang, Wenjie Zhang, Haoyang Cui, Nenghong Xia, Zhiming Huang, Junhao Chu, Guohong Ma

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The impact of sulfur doping on broadband terahertz emission in GaSe single crystals was investigated by optical rectification with oo-o phase matching. The maximum peak value of THz radiation generated from S-doped 2.5 mass% GaSe is 28.3% larger than that of intrinsic GaSe with pump fluence of 637 mW cm-2 and azimuthal angle of 0o. The saturation of THz emission in S-doped 2.5 mass% GaSe is increased compared with that of intrinsic and S-doped 7 mass% GaSe. The results demonstrate that GaSe with appropriate S-doping concentration can effectively improve the broadband THz radiation and saturation.

Original languageEnglish
Article number072004
JournalApplied Physics Express
Volume14
Issue number7
DOIs
StatePublished - Jul 2021
Externally publishedYes

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