Open AccessRole of loss in all-dielectric metasurfaces
Author(s) -
Andrew Cardin,
Kebin Fan,
Willie J. Padilla
Publication year - 2018
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.26.017669
Subject(s) - optics , metamaterial , dielectric , electromagnetic radiation , physics , absorption (acoustics) , dissipation , electromagnetic field , resonance (particle physics) , phase (matter) , dipole , harmonic oscillator , phase response , materials science , optoelectronics , atomic physics , quantum mechanics , thermodynamics
Arrays of dielectric cylinders support two fundamental dipole active eigenmodes, which can be manipulated to elicit a variety of electromagnetic responses in all-dielectric metamaterials. Dissipation is a critical parameter in determining functionality; the present work varies material loss to explore the rich electromagnetic response of this class of metasurface. Four experimental cases are investigated which span electromagnetic response ranging from Huygens surfaces with transmissivity T = 94%, and phase ϕS 21 = 235°, to metasurfaces which absorb 99.96% of incident energy. We find perfect absorption to be analogous to the driven damped harmonic oscillator, with critical damping occurring at resonance. With high phase contrast, transmission, and absorption all accessible from a single system, we present a uniquely diverse all-dielectric system.