Open AccessTip-enhanced Raman scattering from bridged nanocones
Author(s) -
Satish Rao,
Mikko J. Huttunen,
Juha Kontio,
Jouni Mäkitalo,
Milla-Riina Viljanen,
Janne Simonen,
Martti Kauranen,
Dmitri Petrov
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.023790
Subject(s) - raman scattering , materials science , plasmon , raman spectroscopy , optics , scattering , fabrication , coupling (piping) , optoelectronics , physics , medicine , alternative medicine , pathology , metallurgy
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.