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

被引：19
|
作者：
Takeya, K. [1 ]
Takemoto, Y. [1 ]
Kawayama, I. [1 ]
Murakami, H. [1 ]
Matsukawa, T. [2 ]
Yoshimura, M. [2 ]
Mori, Y. [2 ]
Tonouchi, M. [1 ]
机构：
[1] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan
[2] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan
来源：
EPL | 2010年 / 91卷 / 02期
关键词：
NONLINEAR-OPTICAL APPLICATIONS; MID-IR; GENERATION; DAST; TECHNOLOGY; SCATTERING; GROWTH; AGGAS2; WAVES; EDGE;
D O I：
10.1209/0295-5075/91/20004
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have investigated terahertz (THz) emission from lithium ternary chalcopyrite crystals LiInSe(2), LiGaSe(2), LiInS(2), and LiGaS(2) 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 LiInSe(2) (2.87 THz) and LiGaSe(2) (2.60 and 3.45 THz). These phonon modes were most likely caused by impulsive stimulated Raman scattering. Copyright (C) EPLA, 2010
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页数：4
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