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Tip-enhanced Raman scattering from bridged nanocones

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Details

Original languageEnglish
Pages (from-to)23790-23795
JournalOptics Express
Volume18
Issue number23
DOIs
Publication statusPublished - 2010
Publication typeA1 Journal article-refereed

Abstract

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.

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Field of science, Statistics Finland

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