{"title":"Terahertz Emission in an Asymmetric Dual-Grating-Gate High-Electron Mobility Transistor Plasmonic Photomixer under dc Current Flow","authors":"Tomotaka Hosotan, A. Satou, T. Otsuji","doi":"10.1109/IRMMW-THz46771.2020.9370536","DOIUrl":null,"url":null,"abstract":"We report on terahertz (THz) emission from a current-driven asymmetric dual-grating-gate high-electron-mobility transistor (ADGG-HEMT) excited by photomixed dual-CW-infrared laser irradiation whose difference frequency $(\\delta f)$ was set around the THz plasmon-mode frequencies of the 2D electrons in the channel. The radiation spectra observed at 100 K showed two distinctive emission components beyond the black-body radiation, one promoted by $\\delta f$ independent thermally excited incoherent plasmons and the other promoted by $\\delta f$ dependent coherent plasmons. The results suggest the occurrence of the plasmonic instability stimulated by the dc current flow in the channel.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"12 1","pages":"1-2"},"PeriodicalIF":0.0000,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370536","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We report on terahertz (THz) emission from a current-driven asymmetric dual-grating-gate high-electron-mobility transistor (ADGG-HEMT) excited by photomixed dual-CW-infrared laser irradiation whose difference frequency $(\delta f)$ was set around the THz plasmon-mode frequencies of the 2D electrons in the channel. The radiation spectra observed at 100 K showed two distinctive emission components beyond the black-body radiation, one promoted by $\delta f$ independent thermally excited incoherent plasmons and the other promoted by $\delta f$ dependent coherent plasmons. The results suggest the occurrence of the plasmonic instability stimulated by the dc current flow in the channel.
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