非制冷石墨烯光电探测器的调制特性
Modulation characteristics of uncooled graphene photodetectors
摘要:
利用均匀石墨烯层(GL)和多孔石墨烯层(PGL)中二维电子空穴等离子体的密度和有效温度随THz和红外辐射吸收的变化,分析了非制冷太赫兹(THz)和红外(IR)探测器的调制特性.光电探测器(GL光敏电阻和基于PGL的势垒光电二极管)的性能进行了比较。它们的特性也与GL反向偏置光电二极管进行了比较。所得到的结果可以评估这些光电探测器的最终调制频率,并可用于其优化。
英文摘要:
We analyze the modulation characteristics of the uncooled terahertz (THz) and infrared (IR) detectors using the variation of the density and effective temperature of the two-dimensional electron-hole plasma in uniform graphene layers (GLs) and perforated graphene layers (PGLs) due to the absorption of THz and IR radiation. The performance of the photodetectors (both the GL-photoresistor and the PGL-based barrier photodiodes) are compared. Their characteristics are also compared with the GL reverse-biased photodiodes. The obtained results allow to evaluate the ultimate modulation frequencies of these photodetectors and can be used for their optimization.
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