Ordered Gold Nanobowl Arrays as Substrates for Surface-Enhanced Raman Spectroscopy

被引：19

作者：

Chen Ling ^{[1
]}

Liu Fan-Xin

Zhan Peng

Pan Jian

Wang Zhen-Lin

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2011年 / 28卷 / 05期

基金：

中国国家自然科学基金;

关键词：

INFRARED TRANSMISSION; OPTICAL-PROPERTIES; SCATTERING; MOLECULES; AG; NANOPARTICLES; FABRICATION; SERS; FILM; SITE;

D O I：

10.1088/0256-307X/28/5/057801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that an interlinked gold half-shell array fabricated by metal deposition on a sacrificial two-dimensional colloidal crystal template can show a large enhancement in surface-enhanced Raman spectroscopy at its main transmission resonance. It is further observed that Raman signal enhancement shows a noticeable difference when reversing the orientations of the Au nanobowls in relation to the underlying flat dielectric substrate. As the pump laser wavelength is tuned in the vicinity of the resonant plasmonic mode of the structure, the enhancement on an upward Au nanobowl array can be five-fold compared to that on a downward one. Numerical simulation confirms that for the upward nanobowls, a strong localized mode inside the Au nanobowls is formed at the resonant excitation wavelength, which helps to explain this observed extra enhancement in Raman scattering.

引用

页数：4

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