Surface-enhanced Raman spectroscopy on coupled two-layer nanorings

被引：15
|
作者：
Hou, Yumin [1 ]
Xu, Jun [1 ]
Wang, Pengwei [1 ]
Yu, Dapeng [1 ]
机构：
[1] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 20期
关键词：
nanoparticles; nanophotonics; plasmonics; polymers; silver; surface enhanced Raman scattering; surface plasmons; SCATTERING SERS; ARRAYS; NANOPARTICLES;
D O I：
10.1063/1.3431273
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A reproducible quasi-three-dimensional structure, composed of top and bottom concentric nanorings with same periodicity but different widths and no overlapping at the perpendicular direction, is built up by a separation-layer method, which results in huge enhancement of surface-enhanced Raman spectroscopy (SERS) due to the coupling of plasmons. Simulations show plasmonic focusing with "hot arcs" of electromagnetic enhancement meeting the need of quantitative SERS with extremely high sensitivities. In addition, the separation-layer method opens a simple and effective way to adjust the coupling of plasmons among nanostructures which is essential for the fabrication of SERS-based sensors. (C) 2010 American Institute of Physics. [doi:10.1063/1.3431273]
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页数：3
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