Probing the Plasmonic Near-Field of Gold Nanocrescent Antennas

被引：129

作者：

Bukasov, Rostislav ^{[1
]}

Ali, Tamer A. ^{[2
]}

Nordlander, Peter ^{[2
]}

Shumaker-Parry, Jennifer S. ^{[1
]}

机构：

[1] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA

[2] Rice Univ, Dept Phys & Elect & Comp Engn, Houston, TX 77005 USA

来源：

ACS NANO | 2010年 / 4卷 / 11期

基金：

美国国家科学基金会;

关键词：

electromagnetic near field; decay length; infrared plasmon; nanosphere template lithography; plasmonic nanostructure; NANOSCALE OPTICAL BIOSENSOR; RANGE DISTANCE DEPENDENCE; NOBLE-METAL NANOPARTICLES; SELF-ASSEMBLED MONOLAYERS; SILVER NANOPARTICLES; RESONANCE SPECTROSCOPY; SURFACE; FILMS;

D O I：

10.1021/nn101994t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present an investigation of the plasmon induced electromagnetic near field around gold nanocrescent (NC) antennas which exhibit localized surface plasmon resonances (LSPRs) in the Infrared. To probe the near field behavior, we monitored the LSPR shift Of NCs to adsorption of dielectric layers of varying thickness The experimental results are analyzed using theoretical simulations, and the EM field decay lengths for the NCs, are determined We discuss how the structural properties,of NC antennas influence the near field properties and compare the results with the near fields of other metal nanostructures. We show that the nearfield distribution around NCs depends strongly on the structural parameters of the NC and that its spatial extent can be tuned to large distances (>700 nm) from the nanostructure surface. In addition, we discuss NC antenna structural changes associated with exposure to ethanol and buffer solutions and the impact on LSPR properties

引用

页码：6639 / 6650

页数：12

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