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Title: Gratings and their quasistatic equivalents for high optical absorptance

We consider thin lamellar and cylinder gratings, composed of silicon carbide and air, and investigate the conditions under which they can totally absorb an incident plane wave, for both p and s polarizations. We also consider thin-film equivalent in the quasistatic limit to the gratings, deriving the effective dielectric tensor for cylinder gratings. We show that the accuracy of the quasistatic models is a strong function of polarization, wavelength, and grating thickness due to the resonant nature of the optical constants of silicon carbide but that these models can be quantitatively accurate and give a good qualitative guide to the parameter values under which thin gratings can deliver high optical absorptance.
Authors:
;  [1] ; ;  [2]
  1. CUDOS, School of Physics, University of Sydney, New South Wales 2006 (Australia)
  2. Institut Fresnel, CNRS UMR 6133, Aix-Marseille Universite, Domaine Universitaire de Saint Jerome, 13397 Marseille Cedex 20 (France)
Publication Date:
OSTI Identifier:
21313126
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 79; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.79.053850; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; ACCURACY; AIR; DIELECTRIC TENSOR; DIFFRACTION GRATINGS; FUNCTIONS; GRATINGS; POLARIZATION; SILICON CARBIDES; THICKNESS; THIN FILMS; VISIBLE RADIATION; WAVE PROPAGATION; WAVELENGTHS