Authors:	A. Abass, S.R.K. Rodriguez, J. Gomez Rivas, B. Maes
Title:	Tailoring Dispersion and Eigenfield Profiles of Plasmonic Surface Lattice Resonances
Format:	International Journal
Publication date:	1/2014
Journal/Conference/Book:	ACS Photonics
Editor/Publisher:	ACS Publications,
Volume(Issue):	1(1) p.61-68
DOI:	10.1021/ph400072z
Citations:	51 (Dimensions.ai - last update: 15/12/2024) 46 (OpenCitations - last update: 27/6/2024) Look up on Google Scholar
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Abstract

We investigate the radiative coupling between localized surface plasmon resonances (LSPRs) and Rayleigh anomalies (RAs) in periodic arrays of metallic nanorods with varying dimensions but equal lattice constants. The dimensions of the nanorods determine the energy and line width of the LSPR and, thus, enable tailoring of the mixed LSPR−RA states:
surface lattice resonances (SLRs). We present variable angle light extinction experimental spectra for five arrays with different nanorod width and explain our results with numerical simulations. The numerical simulations are done for driven and undriven systems, with the latter revealing the SLR eigenmode properties for the first time. We provide a plane wave model that
interprets the near- and far-fields of these eigenmodes, describing the intricate behavior of
confinement and radiative loss versus in-plane momentum. The SLR line width, band gap associated with the coupled modes, and field extension into the surrounding dielectric are tunable via the dimensions of the nanorods.