title: Tip-enhanced Raman scattering from bridged nanocones.
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.
authors.affiliation: ICFO-Institut de Ciències Fotòniques, Mediterranean Technology Park, 08860 Castelldefels,Barcelona, Spain.
authors.forename: Satish
authors.initials: S
authors.lastname: Rao
authors.forename: Mikko J
authors.initials: MJ
authors.lastname: Huttunen
authors.forename: Juha M
authors.initials: JM
authors.lastname: Kontio
authors.forename: Jouni
authors.initials: J
authors.lastname: Makitalo
authors.forename: Milla-Riina
authors.initials: MR
authors.lastname: Viljanen
authors.forename: Janne
authors.initials: J
authors.lastname: Simonen
authors.forename: Martti
authors.initials: M
authors.lastname: Kauranen
authors.forename: Dmitri
authors.initials: D
authors.lastname: Petrov