Graphene based GHz detectors.

ORAL

Abstract

Graphene demonstrates great promise as a detector over a wide spectral range especially in the GHz range. This is because absorption is enhanced due to the Drude contribution. In the GHz range there are viable detection mechanisms for graphene devices. With this in mind, two types of GHz detectors are fabricated on epitaxial graphene using a lift off resist-based clean lithography process to produce low contact resistance.[1] ~Both device types use asymmetry for detection, consistent with recent thoughts of the photothermoelectric effect (PTE) mechanism. The first is an antenna coupled device. It utilizes two dissimilar contact metals and the work function difference produces the asymmetry. The other device is a field effect transistor constructed with an asymmetric top gate that~creates a PN junction and facilitates tuning the photovoltaic response.~ The response of both device types, tested from 100GHz to 170GHz, are reported. 1. Nath Anindya et al Applied Physics Letters 104, 224102 (2014)

*This work was sponsored by the U.S. Office of Naval Research (award number N000141310865)

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Authors

  • Anthony K Boyd

    • ASEE Postdoctoral Fellow: US Naval Research Laboratory
    • ASEE Postdoctoral Fellow in-residence at U.S. Naval Research Lab, Washington DC

  • Abdel El Fatimy

    • Department of Physics, Georgetown University, Washington DC, 20057
    • Georgetown University

  • Paola Barbara

    • Department of Physics, Georgetown University, Washington DC, 20057
    • Georgetown University

  • Anindya Nath

    • George Mason University
    • George Mason University Postdoctoral fellow in-residence at U.S. Naval Research Lab, Washington DC

  • Paul Campbell

    • U.S. Naval Research Laboratory
    • Naval Research Laboratory

  • Rachael Myers-Ward

    • U.S. Naval Research Laboratory

  • Kevin Daniels

    • NRC Postdoctoral fellow in-residence at U.S. Naval Research Lab, Washington DC
    • NRC postdoc residing at US Naval Research Laboratory

  • D. Kurt Gaskill

    • U.S. Naval Research Laboratory