Plasmonic band gap structures for surface-enhanced Raman scattering

被引：52
作者：
Kocabas, Askin [1 ]
Ertas, Gulay [2 ]
Senlik, S. Seckin [1 ]
Aydinli, Atilla [1 ]
机构：
[1] Bilkent Univ, Dept Phys, TR-06800 Ankara, Turkey
[2] Bilkent Univ, Dept Chem, TR-06800 Ankara, Turkey
来源：
OPTICS EXPRESS | 2008年 / 16卷 / 17期
关键词：
D O I：
10.1364/OE.16.012469
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Surface-enhanced Raman Scattering (SERS) of rhodamine 6G (R6G) adsorbed on biharmonic metallic grating structures was studied. Biharmonic metallic gratings include two different grating components, one acting as a coupler to excite surface plasmon polaritons (SPP), and the other forming a plasmonic band gap for the propagating SPPs. In the vicinity of the band edges, localized surface plasmons are formed. These localized plasmons strongly enhance the scattering efficiency of the Raman signal emitted on the metallic grating surfaces. It was shown that reproducible Raman scattering enhancement factors of over 105 can be achieved by fabricating biharmonic SERS templates using soft nano-imprint technique. We have shown that the SERS activities from these templates are tunable as a function of plasmonic resonance conditions. Similar enhancement factors were also measured for directional emission of photoluminescence. At the wavelengths of the plasmonic absorption peak, directional enhancement by a factor of 30 was deduced for photoluminescence measurements. (c) 2008 Optical Society of America.
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收藏
页码：12469 / 12477
页数：9
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