Plasmon resonance enhanced multicolour photodetection by graphene

被引：686

作者：

Liu, Yuan ^{[1
]}

Cheng, Rui ^{[1
]}

Liao, Lei ^{[2
]}

Zhou, Hailong ^{[2
]}

Bai, Jingwei ^{[1
]}

Liu, Gang ^{[2
]}

Liu, Lixin ^{[1
]}

Huang, Yu ^{[1
,3
]}

Duan, Xiangfeng ^{[2
,3
]}

机构：

[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[3] Univ Calif Los Angeles, Calif Nanosyst Inst, Los Angeles, CA 90095 USA

来源：

NATURE COMMUNICATIONS | 2011年 / 2卷

关键词：

LARGE-AREA; TRANSISTORS; FILMS;

D O I：

10.1038/ncomms1589

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：

Graphene has the potential for high-speed, wide-band photodetection, but only with very low external quantum efficiency and no spectral selectivity. Here we report a dramatic enhancement of the overall quantum efficiency and spectral selectivity that enables multicolour photodetection, by coupling graphene with plasmonic nanostructures. We show that metallic plasmonic nanostructures can be integrated with graphene photodetectors to greatly enhance the photocurrent and external quantum efficiency by up to 1,500%. Plasmonic nanostructures of variable resonance frequencies selectively amplify the photoresponse of graphene to light of different wavelengths, enabling highly specific detection of multicolours. Being atomically thin, graphene photodetectors effectively exploit the local plasmonic enhancement effect to achieve a significant enhancement factor not normally possible with traditional planar semiconductor materials.

引用

页数：7

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