太赫兹辐射
探测器
混合(物理)
光电流
物理
光电子学
天线(收音机)
领域(数学)
参数空间
准静态过程
偏压
计算物理学
凝聚态物理
作者
J. D. Sun (孙建东),Hua Qin,Roger A Lewis,Y. F. Sun (孙云飞),X. Y. Zhang (张晓渝),Yong Cai,Dongmin Wu,B. S. Zhang (张宝顺)
摘要
In our previous work [Sun et al., Appl. Phys. Lett. 100, 013506 (2012)], we inferred the existence of localized self-mixing in an antenna-coupled field-effect terahertz detector. In this Letter, we report a quasistatic self-mixing model taking into account the localized terahertz fields and its verification by comparing the simulated results with the experimental data in a two-dimensional space of the gate voltage and the drain/source bias. The model well describes the detector characteristics: not only the magnitude, but also the polarity, of the photocurrent can be tuned. The existence of strongly localized self-mixing in such detectors is confirmed.
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