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Proceedings Paper

Wavelength-selective visible-light detector based on integrated graphene transistor and surface plasmon coupler
Author(s): Christian W. Smith; Doug Maukonen; R. E. Peale; C. J. Fredricksen; M. Ishigami; J. W. Cleary
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Paper Abstract

We have invented a novel photodetector by mating a surface plasmon resonance coupler with a graphene field effect transistor. The device enables wavelength selectivity for spectral sensing applications. Surface plasmon polaritons (SPPs) are generated in a 50 nm thick Ag film on the surface of a prism in the Kretschmann configuration positioned 500 nm from a graphene FET. Incident photons of a given wavelength excite SPPs at a specific incidence angle. These SPP fields excite a transient current whose amplitude follows the angular resonance spectrum of the SPP absorption feature. Though demonstrated first at visible wavelengths, the approach can be extended far into the infrared. We also demonstrate that the resonant current is strongly modulated by gate bias applied to the FET, providing a clear path towards large-scale spectral imagers with locally addressable pixels.

Paper Details

Date Published: 4 June 2014
PDF: 7 pages
Proc. SPIE 9083, Micro- and Nanotechnology Sensors, Systems, and Applications VI, 90832Q (4 June 2014); doi: 10.1117/12.2050018
Show Author Affiliations
Christian W. Smith, Univ. of Central Florida (United States)
Doug Maukonen, Univ. of Central Florida (United States)
R. E. Peale, Univ. of Central Florida (United States)
C. J. Fredricksen, Univ. of Central Florida (United States)
M. Ishigami, Univ. of Central Florida (United States)
J. W. Cleary, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 9083:
Micro- and Nanotechnology Sensors, Systems, and Applications VI
Thomas George; M. Saif Islam; Achyut K. Dutta, Editor(s)

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