Strong plasmonic enhancement of photovoltage in graphene

被引:779
作者
Echtermeyer, T. J. [2 ]
Britnell, L. [1 ]
Jasnos, P. K. [2 ]
Lombardo, A. [2 ]
Gorbachev, R. V. [3 ]
Grigorenko, A. N. [1 ]
Geim, A. K. [3 ]
Ferrari, A. C. [2 ]
Novoselov, K. S. [1 ]
机构
[1] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England
[2] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England
[3] Univ Manchester, Ctr Mesosci & Nanotechnol, Manchester M13 9PL, Lancs, England
来源
NATURE COMMUNICATIONS | 2011年 / 2卷
基金
英国工程与自然科学研究理事会; 欧洲研究理事会;
关键词
MOLECULES; GAS;
D O I
10.1038/ncomms1464
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
From 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(-1). However, the low responsivity of graphene-based photodetectors compared with traditional III-V-based ones is a potential drawback. Here we show that, by combining graphene with plasmonic nanostructures, the efficiency of graphene-based photodetectors can be increased by up to 20 times, because of efficient field concentration in the area of a p-n junction. Additionally, wavelength and polarization selectivity can be achieved by employing nanostructures of different geometries.
引用
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页数:5
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