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s‐polarization Brewster's angle of stratified metal–dielectric metamaterial in optical regime
Author(s) -
Watanabe Ryosuke,
Iwanaga Masanobu,
Ishihara Teruya
Publication year - 2008
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200879899
Subject(s) - brewster's angle , metamaterial , permittivity , polarization (electrochemistry) , dielectric , materials science , optics , permeability (electromagnetism) , magnetic field , condensed matter physics , dielectric permittivity , metal , brewster , physics , optoelectronics , chemistry , metallurgy , biochemistry , quantum mechanics , membrane
We demonstrate that the optical reflectivity for s‐polarized light vanishes at a certain angle in a stratified metal–dielectric metamaterial numerically and experimentally. The metamaterial consists of a unit cell where a Ag layer of 30 nm thickness is sandwiched by Al 2 O 3 layers of 60 nm thickness. In order to understand the phenomenon in terms of effective permittivity and permeability, we extended a field‐sampling method. The permeability is found to be significantly different from unity, which is the origin of Brewster's angle for s‐polarization. The microscopic field distribution is readily coarse grained with the effective optical parameters. The present result is a manifestation of the magnetic response in the optical regime. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)