Plasmo-photonic Nanowire Arrays for Large-Area Surface-Enhanced Raman Scattering Sensors

被引：2

作者：

Caldwell, Joshua D. ^{[1
]}

Glembocki, Orest J. ^{[1
]}

Rendell, Ronald W. ^{[1
]}

Prokes, Sharka M. ^{[1
]}

Long, James P. ^{[1
]}

Bezares, Francisco J. ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

来源：

PLASMONICS: METALLIC NANOSTRUCTURES AND THEIR OPTICAL PROPERTIES VIII | 2010年 / 7757卷

关键词：

surface enhanced Raman scattering; SERS; e-beam lithography; Reactive ion etching; plasmonics; nanoparticles; plasmonic arrays; grating; NANOPARTICLE ARRAYS; SILVER;

D O I：

10.1117/12.860504

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Despite surface-enhanced Raman scattering (SERS) being first observed in the late 1970's, efforts to provide reproducible SERS-based chemical sensors have been hindered by the inability to make large-area devices with a uniform SERS response. Furthermore, variations in the observed spectra occur due to the variable interactions and orientations of the analyte with the textured SERS surfaces. Here we report on periodic arrays of Ag- and Au-coated vertical silicon nanopillars fabricated by e-beam lithography and reactive ion etching for use as SERS sensor templates that provide both large and uniform enhancement factors (up to 1x10(8)) over the structure surface area. We discuss the impact of the overall geometry of the structures, by varying both the diameter and the edge-to-edge spacing in an effort to optimize the SERS response for a given excitation laser wavelength. Calculations of the electromagnetic field distributions within such structures were also performed and support the behavior observed experimentally.

引用

页数：8

共 18 条

[1] Metal-adsorbate hybridized electronic states and their impact on surface enhanced Raman scattering [J].