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4 September 2008 Ultra-thin wide-angle perfect absorber for infrared frequencies
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A two dimensional design of an ultra-thin, wide-angle perfect absorber for infrared light is proposed. The geometry of the structure is simple enough to be realized with present fabrication techniques, yet it is shown numerically to exhibit nearly 100% absorption at the resonant wavelength that is tunable by adjusting its geometric parameters. The angular dependence of the absorption for different polarizations of the incident radiation is presented, remaining above 95% in P-polarization and 90% in S-polarization (in the orthogonal incidence plane) for the incidence angles up to 45°. The robustness and tunability of the structure with respect to the variations of its geometric parameters is quantified.
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Chihhui Wu, Yoav Avitzour, and Gennady Shvets "Ultra-thin wide-angle perfect absorber for infrared frequencies", Proc. SPIE 7029, Metamaterials: Fundamentals and Applications, 70290W (4 September 2008);

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