Graphene is a promising candidate for the development of detectors of Terahertz (THz) radiation.
A well-known detection scheme due to Dyakonov and Shur exploits plasma waves in a field-effect
transistor (FET), whereby a dc photovoltage is generated in response to a THz field. In the quest
for devices with a better signal-to-noise ratio, we theoretically investigate a plasma-wave
photodetector in which a dc photocurrent is generated in a graphene FET. The noise equivalent
power of our device is shown to be much smaller than that of a Dyakonov-Shur detector in a wide
spectral range