Temperature Dependence of Terahertz Wave Generation from DAST Crystal Illuminated by 1.56 mm Fiber Laser

Yoshiaki Takemoto ¹, Kei Takeya ¹, Iwao Kawayama ¹, Hironaru Murakami ¹, and Masayoshi Tonouchi ^1*, Takeshi Matsukawa ², Yoshinori Takahashi ², Masashi Yoshimura ², Yasuo Kitaoka ², Yusuke Mori ² and Takatomo Sasaki ^2
1 Institute of Laser Engineering, Osaka University, 2-6, Yamadaoka, Suita, Osaka, 565-0871, Japan
² Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka, 565-0871, Japan
^*1 Email: tonouchi@ile.osaka-u.ac.jp

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Abstract: 4-Dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) crystal can generate broadband terahertz (THz) wave by optical rectification using femtosecond laser pulses. However, the frequency spectrum of generated THz waves has dips derive from the absorptions of the DAST crystal. We observed temperature dependence of THz wave generation from the DAST crystal. In terms of the frequency spectrum, broad dips at 1.1 and around 4.5 THz at room temperature shift to higher frequency with temperature decreasing, while a small dip at 3 THz shows no temperature dependence.

Keywords: Terahertz, DAST crystal, Absorption, Temperature dependence.

Received: 2011-2-4

Accepted: 2011-3-29

Published: 2011-6-30

Acknowledgments: The authors acknowledge a grant from the Global COE Program, "Center for Electronic Devices Innovation", from the Ministry of Education, Culture, Sports, Science and Technology of Japan. This work was partially supported by the New Energy and Industrial Technology Development Organization (NEDO), and the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Scientific Research A (22246043).

Cite this article:
Yoshiaki Takemoto, Kei Takeya, Iwao Kawayama, Hironaru Murakami, Masayoshi Tonouchi, Takeshi Matsukawa, Yoshinori Takahashi, Masashi Yoshimura, Yasuo Kitaoka, Yusuke Mori and Takatomo Sasaki.Temperature Dependence of Terahertz Wave Generation from DAST Crystal Illuminated by 1.56 mm Fiber Laser[J]. International Journal of Terahertz Science and Technology, 2011, Vol.4, No.2: 42-45.  DOI:10.11906/TST.042-045.2011.06.05

URL: http://www.tstnetwork.org/10.11906/TST.042-045.2011.06.05