Abstract
We propose and theoretically substantiate the concept of terahertz and infrared photodetectors using the resonant radiative transitions between graphene layers (GLs) in double-GL structures. The calculated absorption spectrum and the spectral characteristics of the photodetector responsivity exhibit sharp resonant maxima at the photon energies in a wide range. The resonant maxima can be tuned by the applied voltage. We compare the photodetector responsivity with that of the GL p-i-n photodiodes and quantum-well infrared photodetectors. Weak temperature dependences of the photocurrent and dark current enable the effective operation of the proposed photodetector at room temperature.
Original language | English |
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Article number | 163505 |
Journal | Applied Physics Letters |
Volume | 104 |
Issue number | 16 |
DOIs | |
Publication status | Published - 2014 Apr 21 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)