Terahertz emission from coherent phonons in lithium ternary chalcopyrite crystals illuminated by 1560 nm femtosecond laser pulses

We have investigated terahertz (THz) emission from lithium ternary chalcopyrite crystals LiInSe2, LiGaSe2, LiInS2, and LiGaS2 that were illuminated by 1560 nm femtosecond pump laser pulses. Monocyclic THz emission caused by nonlinear optical effects was initially observed in all the illuminated crys...

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Published inEurophysics letters Vol. 91; no. 2; pp. 20004 - 20007
Main Authors Takeya, K, Takemoto, Y, Kawayama, I, Murakami, H, Matsukawa, T, Yoshimura, M, Mori, Y, Tonouchi, M
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.07.2010
EDP Sciences
Subjects
07.57.Pt
42.70.Mp
63.20.K
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Summary:We have investigated terahertz (THz) emission from lithium ternary chalcopyrite crystals LiInSe2, LiGaSe2, LiInS2, and LiGaS2 that were illuminated by 1560 nm femtosecond pump laser pulses. Monocyclic THz emission caused by nonlinear optical effects was initially observed in all the illuminated crystals. Narrow-band THz emission from the coherent phonons were observed in LiInSe2 (2.87 THz) and LiGaSe2 (2.60 and 3.45 THz). These phonon modes were most likely caused by impulsive stimulated Raman scattering.
Bibliography:ark:/67375/80W-XHP9DFFR-8
istex:2C42DDD44182C4C4B34F6F3C918F5A887F8A8715
publisher-ID:epl12847
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/91/20004