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Apex-enhanced Raman spectroscopy using double-hole arrays in a gold film

被引：95
作者：
Lesuffleur, A.
Kumar, L. K. S.
Brolo, A. G.
Kavanagh, K. L.
Gordon, R.
机构：
[1] Univ Victoria, Dept Elect & Comp Engn, Victoria, BC V8W 3P6, Canada
[2] Univ Victoria, Dept Chem, Victoria, BC V8W 3V6, Canada
[3] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 06期
关键词：
OPTICAL-TRANSMISSION; SUBWAVELENGTH HOLE; LIGHT TRANSMISSION; METAL-FILM; NANOHOLE ARRAYS; REAL METAL; NANOSTRUCTURE; SCATTERING;
D O I：
10.1021/jp067677e
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：
Periodic arrays of subwavelength double-hole apertures in a 100 urn gold film were used for surface-enhanced Raman scattering (SERS). The periodicity of the arrays and the double-hole overlap were varied to measure their effect on the Raman enhancement. The experiments were realized in two geometries: forward-scattering (transmission through the holes) and back-scattering. Significant enhancement in the SERS signal was observed in both geometries for the optimized substrates. Electromagnetic calculations verified that the local electromagnetic field intensity was indeed maximized for the arrays that produced the largest SERS effect. The double-hole structure was shown to produce controlled and predictable SERS due to the enhanced field localized at the apexes formed by the overlap between the holes.
引用
收藏
页码：2347 / 2350
页数：4
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