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arXiv · 1107.4176

Strong Plasmonic Enhancement of Photovoltage in Graphene

T. J. Echtermeyer·L. Britnell·P. K. Jasnos·A. Lombardo·R. V. Gorbachev·A. N. Grigorenko·A. K. Geim·A. C. Ferrari·K. S. Novoselov
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Abstract

Amongst the wide spectrum of potential applications of graphene, ranging from transistors and chemical-sensors to nanoelectromechanical devices and composites, the field of photonics and optoelectronics is believed to be one of the most promising. Indeed, graphene's suitability for high-speed photodetection was demonstrated in an optical communication link operating at 10 Gbit/s\cite. However, the low responsivity of graphene-based photodetectors compared to traditional III-V based ones is a potential drawback. Here we show that, by combining graphene with plasmonic nanostructures, the efficiency of graphene-based photodectors can be increased by up to 20 times, due to field concentration in the area of a p-n junction. Additionally, wavelength and polarization selectivity can be achieved employing nanostructures of different geometries.

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T. J. Echtermeyer, L. Britnell, P. K. Jasnos, A. Lombardo, R. V. Gorbachev, A. N. Grigorenko, A. K. Geim, A. C. Ferrari, K. S. Novoselov. 2011-07-21. Strong Plasmonic Enhancement of Photovoltage in Graphene. https://doi.org/10.1038/ncomms1464 (2011)

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