Characteristics of THz-wave radiation using a monolithic grating coupler on a LiNbO3 crystal |
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| Authors: | Kodo Kawase Manabu Sato Tetsuo Taniuchi and Hiromasa Ito |
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| Institution: | (1) Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, 980-77 Sendai, Japan |
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| Abstract: | Wide tunable terahertz (THz) wave generation was successfully demonstrated utilizing a grating coupler fabricated on the surface of a LiNbO3 crystal which was pumped by a Q-switched Nd:YAG laser. In this paper, we report the detailed characteristics of the oscillation and the radiation including tunability, spatial and temporal coherency, directivity, and efficiency. Oscillation using a LiTaO3 crystal was also performed, in which experimental phasematching condition values agreed well with the calculated one. |
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