Abstract
In this paper, the room temperature performance of bilayer graphene terahertz photodetector is studied by calculating of its dark current and dark current limited detectivity at room temperature. In the first step the spectral dependences of the photodetector responsivity as function of the device structural parameters is calculated. It is demonstrated that at the radiation frequency close to the resonant frequencies of plasma oscillations, the responsivity can exhibit sharp and very high maxima corresponding to fairly large responsivity values. In the second step the dark current and dark current limited detectivity for different temperatures, bias voltage, and widths of graphene layer is calculated and analyzed. The obtained results show that for the bilayer graphene photodetector with W=5nm, L=20 μm, Vb=2V, Vg=2V, value of dark current limited detectivity D*, at room temperature T=300°K and also T=200°K are 9×106 cmHz/W and ∼6×109 cmHz/W, respectively.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Optik - International Journal for Light and Electron Optics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
