Gold nanoring trimers: a versatile structure for infrared sensing

被引：43

作者：

Teo, Siew Lang ^{[1
]}

Lin, Vivian Kaixin ^{[1
]}

Marty, Renaud ^{[2
,3
]}

Large, Nicolas ^{[2
,3
,4
,5
]}

Alarcon-Llado, Esther ^{[1
]}

Arbouet, Arnaud ^{[2
,3
]}

Girard, Christian ^{[2
,3
]}

Aizpurua, Javier ^{[4
,5
]}

Tripathy, Sudhiranjan ^{[1
]}

Mlayah, Adnen ^{[2
,3
]}

机构：

[1] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore

[2] CNRS, CEMES, F-31055 Toulouse 4, France

[3] Univ Toulouse, F-31055 Toulouse 4, France

[4] CSIC, UPV EHU, Ctr Fis Mat, San Sebastian 20018, Spain

[5] Donostia Int Phys Ctr, San Sebastian 20018, Spain

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 21期

关键词：

ENHANCED RAMAN-SCATTERING; NANOPARTICLE DIMERS; PLASMON RESONANCES;

D O I：

10.1364/OE.18.022271

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work we report on the observation of surface plasmon properties of periodic arrays of gold nanoring trimers fabricated by electron beam lithography. It is shown that the localized surface plasmon resonances of such gold ring trimers occur in the infrared spectral region and are strongly influenced by the nanoring geometry and their relative positions. Based on numerical simulations of the optical extinction spectra and of the electric near-field intensity maps, the resonances are assigned to surface plasmon states arising from the strong intra-trimer electromagnetic interaction. We show that the nanoring trimer configuration allows for generating infrared surface plasmon resonances associated with strongly localized electromagnetic energy, thus providing plasmonic nanoresonators well-suited for sensing and surface enhanced near-infrared Raman spectroscopy. (C) 2010 Optical Society of America

引用

页码：22271 / 22282

页数：12

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