Cascaded Optical Field Enhancement in Composite Plasmonic Nanostructures

被引：40

作者：

Kravets, V. G. ^{[1
]}

Zoriniants, G. ^{[2
]}

Burrows, C. P. ^{[2
]}

Schedin, F. ^{[1
]}

Casiraghi, C. ^{[1
,3
]}

Klar, P. ^{[3
]}

Geim, A. K. ^{[1
]}

Barnes, W. L. ^{[2
]}

Grigorenko, A. N. ^{[1
]}

机构：

[1] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[2] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England

[3] Free Univ Berlin, Dept Phys, D-14195 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 24期

关键词：

RAMAN-SCATTERING;

D O I：

10.1103/PhysRevLett.105.246806

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present composite plasmonic nanostructures designed to achieve cascaded enhancement of electromagnetic fields at optical frequencies. Our structures were made with the help of electron-beam lithography and comprise a set of metallic nanodisks placed one above another. The optical properties of reproducible arrays of these structures were studied by using scanning confocal Raman spectroscopy. We show that our composite nanostructures robustly demonstrate dramatic enhancement of the Raman signals when compared to those measured from constituent elements.

引用

页数：4

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