Journal
OPTICS EXPRESS
Volume 18, Issue 23, Pages 23790-23795Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.023790
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Funding
- Spanish Ministry of Science and Innovation [MICINNFIS2008-00114]
- Fundacion CELLEX Barcelona
- Academy of Finland [123109, 135084]
- Finnish Funding Agency for Technology and Innovation [40149/08]
- COST action [MP0604]
- Graduate School of Modern Optics and Photonics in Finland
- Graduate School of the Tampere University of Technology
- Ulla Tuominen Foundation
- Academy of Finland (AKA) [123109, 135084, 123109, 135084] Funding Source: Academy of Finland (AKA)
- ICREA Funding Source: Custom
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We present two silver nanocones separated by 450 nm, well beyond the typical gap spacing of coupled nanoantennas, and connected by a metal bridge to facilitate plasmonic coupling between them. The tip-enhanced Raman scattering from crystal violet molecules is found to be almost an order of magnitude higher from the bridged cones than from individual cones. This result is supported by local-field calculations of the two types of structures. The bridged nanocones are easily fabricated by a nanoimprint-based process, thus offering a faster and simpler approach compared to other fabrication techniques. (C) 2010 Optical Society of America
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