THz modulator based on the Drude model  

作　　者：杨鹏飞 姚建铨 徐伟 

机构地区：[1]Institute of Laser & Optoelectronics,College of Precision Instruments and Optoelectronic Engineering,Tianjin University

出　　处：《Optoelectronics Letters》2011年第1期19-21,共3页光电子快报（英文版）

基　　金：supported by the National Basic Research Program of China (No.2007CB310403)

摘　　要：An amplitude modulator for the terahertz(THz) range is designed.The Drude model is adopted,in which the collision damping is independent of the carrier energy.The Si block with 808 nm laser is illustrated,and it will generate the photocarriers.The injected photo-carriers will change the conductivity and dielectric of the sample,which have direct relationship with the absorption coefficient of the THz wave,hence to control the characteristics of the THz wave in the sample.By changing the light intensity,due to the different photon-generated carrier concentrations,the single transmission of the THz wave in the silicon substrate is changed remarkably.An amplitude modulator for the terahertz（THz） range is designed.The Drude model is adopted,in which the collision damping is independent of the carrier energy.The Si block with 808 nm laser is illustrated,and it will generate the photocarriers.The injected photo-carriers will change the conductivity and dielectric of the sample,which have direct relationship with the absorption coefficient of the THz wave,hence to control the characteristics of the THz wave in the sample.By changing the light intensity,due to the different photon-generated carrier concentrations,the single transmission of the THz wave in the silicon substrate is changed remarkably.

关 键 词：Drude模型 太赫兹波 调制器 基础 载流子浓度 碰撞阻尼 THZ波 光子产生 

分 类 号：TN761[电子电信—电路与系统] O484.41[理学—固体物理]