Enhanced Terahertz Wave Generation from Cytop Antireflection–Coated DAST Crystal
| Autor: | Hirohisa Uchida, Peibin Wang, Kodo Kawase, Kei Takeya, Saroj R. Tripathi, Takayuki Kamei, Takeshi Takagi, Chisa Koyama |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Radiation Materials science business.industry Terahertz radiation Reflection loss engineering.material Condensed Matter Physics 01 natural sciences Amorphous solid 010309 optics Crystal Coating 0103 physical sciences engineering Optoelectronics Laser power scaling Electrical and Electronic Engineering business Instrumentation Excitation Common emitter |
| Zdroj: | Journal of Infrared, Millimeter, and Terahertz Waves. 41:552-556 |
| ISSN: | 1866-6906 1866-6892 |
| DOI: | 10.1007/s10762-020-00674-6 |
| Popis: | There was no appropriate antireflection coating material for organic nonlinear optical (NLO) crystal used for terahertz wave generation; therefore, it was difficult to reduce Fresnel’s reflection loss of laser power used to excite the emitter crystal until we found that an amorphous polymer “Cytop” was applicable. Here, we demonstrate enhanced terahertz (THz) wave generation from an organic NLO crystal using a coating made from Cytop. With the Cytop coating, surface reflection losses of the excitation light were minimized, resulting in a significant improvement in THz wave generation over a wide frequency range. |
| Databáze: | OpenAIRE |
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