T. Furuya, J. Muldera, H. Kitahara, Taiki Ozaki, M. Bakunov, M. Tani
{"title":"Terahertz Radiation from a Thin GaAs Crystal in a Metallic Tapered Parallel Plate Waveguide","authors":"T. Furuya, J. Muldera, H. Kitahara, Taiki Ozaki, M. Bakunov, M. Tani","doi":"10.1109/IRMMW-THz50926.2021.9566915","DOIUrl":null,"url":null,"abstract":"Terahertz generation in a thin (100-µm thick) GaAs crystal sandwiched between the walls of a metallic tapered parallel plate waveguide at its narrow end and pumped by a 1560-nm femtosecond laser has been experimentally studied. The terahertz radiation characteristics are compared with those from a thick bulk GaAs crystal in a free space. The results demonstrate that the taper structure improves the directivity of terahertz emission from thin crystals pumped by focused optical beams.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"286 1","pages":"1-1"},"PeriodicalIF":0.0000,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IRMMW-THz50926.2021.9566915","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
Terahertz generation in a thin (100-µm thick) GaAs crystal sandwiched between the walls of a metallic tapered parallel plate waveguide at its narrow end and pumped by a 1560-nm femtosecond laser has been experimentally studied. The terahertz radiation characteristics are compared with those from a thick bulk GaAs crystal in a free space. The results demonstrate that the taper structure improves the directivity of terahertz emission from thin crystals pumped by focused optical beams.
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