Graphene-based lateral Schottky diodes for detecting terahertz radiation

G. Fedorov; I. Gayduchenko; N. Titova; M. Moskotin; E. Obraztsova; M. Rybin; G. Goltsman

doi:10.1117/12.2307020

9 May 2018 Graphene-based lateral Schottky diodes for detecting terahertz radiation

G. Fedorov, I. Gayduchenko, N. Titova, M. Moskotin, E. Obraztsova, M. Rybin, G. Goltsman

Proceedings Volume 10680, Optical Sensing and Detection V; 1068007 (2018) https://doi.org/10.1117/12.2307020
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

Demand for efficient terahertz radiation detectors resulted in intensive study of the carbon nanostructures as possible solution for that problem. In this work we investigate the response to sub-terahertz radiation of graphene field effect transistors of two configurations. The devices of the first type are based on single layer CVD graphene with asymmetric source and drain (vanadium and gold) contacts and operate as lateral Schottky diodes (LSD). The devices of the second type are made in so-called Dyakonov-Shur configuration in which the radiation is coupled through a spiral antenna to source and top electrodes. We show that at 300 K the LSD detector exhibit the room-temperature responsivity from R = 15 V/W at f= 129 GHz to R = 3 V/W at f = 450 GHz. The DS detector responsivity is markedly lower (2 V/W) and practically frequency independent in the investigated range. We find that at low temperatures (77K) the graphene lateral Schottky diodes responsivity rises with the increasing frequency of the incident sub-THz radiation. We interpret this result as a manifestation of a plasmonic effect in the devices with the relatively long plasmonic wavelengths. The obtained data allows for determination of the most promising directions of development of the technology of nanocarbon structures for the detection of THz radiation.

Conference Presentation

Citation Download Citation

G. Fedorov, I. Gayduchenko, N. Titova, M. Moskotin, E. Obraztsova, M. Rybin, and G. Goltsman "Graphene-based lateral Schottky diodes for detecting terahertz radiation", Proc. SPIE 10680, Optical Sensing and Detection V, 1068007 (9 May 2018); https://doi.org/10.1117/12.2307020

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available