Authors
Ricardo Tellez-Limon, Mickaël Fevrier, Aniello Apuzzo, Rafael Salas-Montiel, Sylvain Blaize,
Title
Numerical analysis of tip-localized surface plasmon resonances in periodic arrays of gold nanowires with triangular cross section
In
J. Opt. Soc. Am. B
Volume
34
Issue
10
Pages
2147–2154
Publisher
OSA
Year
2017
Publisher's URL
http://dx.doi.org/10.1364/JOSAB.34.002147
Indexed by
Abstract
In this contribution, we numerically study the tip enhancement of localized surface plasmons in periodic arrays of gold nanowires with triangular cross section under different illumination configurations. We found that the plasmonic resonance in a single nanowire is excited with a transverse magnetic (TM) plane wave impinging from the substrate at the critical angle, whereas grazing angles are required for the excitation of resonant propagating modes in periodic arrays of triangular-shaped nanowires. Moreover, we found that resonant plasmonic quasi-Bloch modes are efficiently excited with the fundamental TM mode of a dielectric waveguide placed underneath the array. The integrated plasmonic structure allows a strong enhancement of the electromagnetic field at the tip of the nanowires, hence its potential application in the development of new nanophotonic devices.
Affiliations
Offprint