Plasmon Resonance in Individual Nanogap Electrodes Studied Using Graphene Nanoconstrictions as Photodetectors

被引：97

作者：

Shi, S. -F. ^{[1
]}

Xu, Xiaodong ^{[1
,2
]}

Ralph, D. C. ^{[1
,3
]}

McEuen, P. L. ^{[1
,3
]}

机构：

[1] Cornell Univ, Dept Phys, Ithaca, NY 14853 USA

[2] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[3] Cornell Univ, Kavli Inst Cornell, Ithaca, NY 14853 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 04期

基金：

美国国家科学基金会;

关键词：

Plasmon; graphene; photocurrent; nanoribbon; ENHANCED RAMAN-SCATTERING; QUANTUM DOTS; FIELD ENHANCEMENT; GENERATION;

D O I：

10.1021/nl200522t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We achieve direct electrical readout of the wavelength and polarization dependence of the plasmon resonance in individual gold nanogap antennas by positioning a graphene nanoconstriction within the gap as a localized photodetector. The polarization sensitivities can be as large as 99%, while the plasmon-induced photocurrent enhancement is 2-100. The plasmon peak frequency, polarization sensitivity, and photocurrent enhancement all vary between devices, indicating the degree to which the plasmon resonance is sensitive to nanometer-scale irregularities.

引用

页码：1814 / 1818

页数：5

共 36 条

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[Anonymous], 2009, Classical Electrodynamics

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