Modulation characteristics of uncooled graphene photodetectors

Abstract

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.

10 pages, 3 figures

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Cited by in corpus (3)

• Resonant plasmonic detection of terahertz radiation in field-effect transistors with the graphene channel and the black-As${}_x$P${}_{1-x}$ gate layer
• Heat capacity of nonequilibrium electron-hole plasma in graphene layers and graphene~bilayers
• Rectification and bolometric terahertz radiation detectors based on perforated graphene structures exhibiting plasmonic resonant response