Wide-angle infrared absorber based on negative index plasmonic metamaterial
Yoav Avitzour, Yaroslav A. Urzhumov, Gennady Shvets
TL;DR
This paper introduces a metamaterials-based wide-angle infrared absorber using a negative index plasmonic metamaterial, achieving near-perfect absorption at angles up to 45 degrees, with potential applications in infrared imaging and thermal sources.
Contribution
It presents an analytical and practical implementation of a frequency-tunable PIMNIM for wide-angle infrared absorption, advancing metamaterials technology.
Findings
Achieves near 100% absorption for angles up to 45 degrees
Provides a frequency-tunable PIMNIM design based on plasmonic metamaterials
Potential applications in infrared imaging and thermal sources
Abstract
A metamaterials-based approach to making a wide-angle absorber of infrared radiation is described. The technique is based on an anisotropic Perfectly Impedance Matched Negative Index Material (PIMNIM). It is shown analytically that a sub-wavelength in all three dimensions PIMNIM enables absorption of close to 100% for incidence angles up to to the normal. A specific implementation of such frequency-tunable PIMNIM based on plasmonic metamaterials is presented. Applications to infrared imaging and coherent thermal sources are described.
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