Open AccessPlasmonic resonances in optomagnetic metamaterials based on double dot arrays
Author(s) -
V. G. Kravets,
F. Schedin,
Shaun Taylor,
David Viita,
А. Н. Григоренко
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.009780
Subject(s) - nanopillar , plasmon , metamaterial , optics , interferometry , phase (matter) , materials science , reflection (computer programming) , antisymmetric relation , physics , optoelectronics , nanostructure , nanotechnology , quantum mechanics , computer science , mathematical physics , programming language
We study optical properties of optomagnetic metamaterials produced by regular arrays of double gold dots (nanopillars). Using combined data of spectroscopic ellipsometry, transmission and reflection measurements, we identify localized plasmon resonances of a nanopillar pair and measure their dependences on dot sizes. We formulate the necessary condition at which an effective field theory can be applied to describe optical properties of a composite medium and employ interferometry to measure phase shifts for our samples. A negative phase shift for transmitted green light coupled to an antisymmetric magnetic mode of a double-dot array is observed.