Abstract-The detection of sub-terahertz radiation using graphene-layer and graphene-nanoribbon FETs with asymmetric contacts

Igor A. Maxim, V.Moskotin, Yakov E. Matyushkin, Maxim G. Rybin,  Elena D. Obraztsova, Victor I.Ryzhii, Gregory N. Goltsman, Georgy E. Fedorov, 

https://www.sciencedirect.com/science/article/pii/S2214785318321321

We report on the detection of sub-terahertz radiation using single layer graphene and graphene-nanoribbon FETs with asymmetric contacts (one is the Schottky contact and one – the Ohmic contact). We found that cutting graphene into ribbons a hundred nanometers wide leads to a decrease of the response to sub-THz radiation. We show that suppression of the response in the graphene nanoribbons devices can be explained by unusual properties of the Schottky barrier on graphene-vanadium interface