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Report No.

Design of rectangular transmission gratings fabricated in LiNbO$$_{3}$$ for high-power terahertz-wave generation

Nagashima, Keisuke; Kosuge, Atsushi  

Precise parameters are investigated for rectangular transmission gratings fabricated in LiNbO$$_{3}$$ substrate for the purpose of high-power terahertz-wave generation. Here, a simple setup is considered, where the pumping laser is injected to the grating surface from air or fused silica. The maximum diffraction efficiencies are 0.4 for air and 0.9 for fused silica. The designed gratings have deep grooves with the depth of about 0.5 $$mu$$m and the width of 0.12-0.14 $$mu$$m. It was found that the diffraction efficiency is much less sensitive to the groove depth, than to the groove width.



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Category:Physics, Applied



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