Open AccessMetamaterials with angle selective emissivity in the near-infrared
Author(s) -
Jeremy A. Bossard,
Douglas H. Werner
Publication year - 2013
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.21.005215
Subject(s) - emissivity , metamaterial , optics , infrared , materials science , split ring resonator , low emissivity , dielectric , selective surface , resonator , metamaterial absorber , optoelectronics , tunable metamaterials , physics
Metamaterials have been previously studied for their ability to tailor the dispersive IR emissivity of a surface. Here, we investigate two metamaterial structures based on an electromagnetic band-gap surface and a dielectric resonator array for use as near-IR emitters with custom angle selectivity. A genetic algorithm is successfully employed to optimize the metamaterial structures to have minimum emissivity in the normal direction and high emissivity at custom off-normal angles specified by the designer. Two symmetry conditions are utilized to achieve emissivity patterns that are azimuthally stable or distinct in the two orthogonal plane cuts.