Difference-frequency terahertz-wave generation from 4-dimethylamino-N-methyl-4-stilbazolium-tosylate by use of an electronically tuned Ti:sapphire laser
1999; Optica Publishing Group; Volume: 24; Issue: 15 Linguagem: Inglês
10.1364/ol.24.001065
ISSN1539-4794
AutoresKodo Kawase, Maya Mizuno, Shunichi Sohma, Hidenori Takahashi, T. Taniuchi, Yoshiharu Urata, Satoshi Wada, Hideo Tashiro, Hiromasa Ito,
Tópico(s)Spectroscopy and Laser Applications
ResumoAmong nonlinear materials, the organic ionic salt crystal 4-dimethylamino- N -methyl-4-stilbazolium-tosylate (DAST) is known for its large nonlinearity. We generated a coherent terahertz (THz) wave, using DAST, from the difference frequency between two oscillating wavelengths of an electronically tuned Ti:sapphire laser. In LiNbO(3), LiTaO(3), KTiOPO(4), and GaP crystals, THz-wave generation was not observed under the same experimental conditions. This result proves the high efficiency of DAST crystals for generation of difference-frequency THz waves.
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