A. Gupta, V. Gupta, A. Sharma, G. Polónyi, J. Fülöp
{"title":"Ultrafast Nonlinear Carrier Dynamics in n-Doped Ge at High Field Strengths","authors":"A. Gupta, V. Gupta, A. Sharma, G. Polónyi, J. Fülöp","doi":"10.1109/IRMMW-THz50926.2021.9566951","DOIUrl":null,"url":null,"abstract":"Ultrafast carrier dynamics in n-doped Ge is investigated by THz pump—THz probe spectroscopy with pump THz field strengths up to <0.45 MV/cm provided by a user-accessible compact nonlinear THz spectroscopy facility at ELI-ALPS. The saturation and recovery of the free-carrier absorption is observed on picosecond time scale at 300 K and 95 K temperatures. Furthermore, the intensity-dependent modulation of the refractive index is also observed.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"4 1","pages":"1-2"},"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-THz50926.2021.9566951","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
Ultrafast carrier dynamics in n-doped Ge is investigated by THz pump—THz probe spectroscopy with pump THz field strengths up to <0.45 MV/cm provided by a user-accessible compact nonlinear THz spectroscopy facility at ELI-ALPS. The saturation and recovery of the free-carrier absorption is observed on picosecond time scale at 300 K and 95 K temperatures. Furthermore, the intensity-dependent modulation of the refractive index is also observed.
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