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Opt Express. 2011 Jul 18;19(15):14260-7. doi: 10.1364/OE.19.014260.

Optically thin composite resonant absorber at the near-infrared band: a polarization independent and spectrally broadband configuration.

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  • 1Nanotechnology Research Center, Bilkent University, Bilkent, 06800 Ankara, Turkey.


We designed, fabricated, and experimentally characterized thin absorbers utilizing both electrical and magnetic impedance matching at the near-infrared regime. The absorbers consist of four main layers: a metal back plate, dielectric spacer, and two artificial layers. One of the artificial layers provides electrical resonance and the other one provides magnetic resonance yielding a polarization independent broadband perfect absorption. The structure response remains similar for the wide angle of incidence due to the sub-wavelength unit cell size of the constituting artificial layers. The design is useful for applications such as thermal photovoltaics, sensors, and camouflage.

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