Manifestation of plasmonic response in the detection of sub-terahertz radiation by graphene-based devices

I. A. Gayduchenko, G. E. Fedorov, M. V. Moskotin, D. I. Yagodkin, S. V. Seliverstov, G. N. Goltsman, A. Yu Kuntsevich, M. G. Rybin, E. D. Obraztsova, V. G. Leiman, M. S. Shur, T. Otsuji, V. I. Ryzhii

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We report on the sub-terahertz (THz) (129-450 GHz) photoresponse of devices based on single layer graphene and graphene nanoribbons with asymmetric source and drain (vanadium and gold) contacts. Vanadium forms a barrier at the graphene interface, while gold forms an Ohmic contact. We find that at low temperatures (77 K) the detector 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. Graphene nanoribbon devices display a similar pattern, albeit with a lower responsivity.

Original languageEnglish
Article number245204
JournalNanotechnology
Volume29
Issue number24
DOIs
Publication statusPublished - 2018 Apr 16

Keywords

  • graphene
  • graphene nanoribbon
  • plasma waves
  • terahertz detector
  • terahertz radiation

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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