Modulation characteristics of uncooled graphene photodetectors
Abstract
We report on the modulation characteristics of the uncooled terahertz (THz) and infrared (IR) detectors using uniform graphene layers (GLs) and perforated graphene layers (PGL). Our analysis shows that the PGL detectors could have more than an order of magnitude smaller dark current compared to more conventional GL reversed biased photodetectors operating in the same frequency range. The modulation mechanism for the simulated photodetectors is the variation of the density and effective temperature of the two-dimensional electron–hole plasma with the varying intensity of the THz or IR radiation. Our simulations predict a reasonable modulation depth up to the modulation frequencies of 50 GHz for the impinging radiation frequencies up to the mid-IR range.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 02, 2021
- Source ID
- 10.1063/5.0046215
Entities
People
- Maxim Ryzhii
- Michael Shur
- Taiichi Otsuji
- V. G. Leiman
- V. Ryzhii
- Vladimir Mitin
Organizations
- Japan Society for the Promotion of Science
- Moscow Institute of Physics and Technology
- Office of Naval Research
- Rensselaer Polytechnic Institute
- Russian Center for Science Information
- Tohoku University
- United States Army Research Laboratory
- University at Buffalo
- University of Aizu