Infrared spatial and frequency selective metamaterial with near-unity absorbance.
TL;DR: This work demonstrates, for the first time, a spatially dependent metamaterial perfect absorber operating in the infrared regime, and achieves an experimental absorption of 97% at a wavelength of 6.0 μm.
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Abstract: We demonstrate, for the first time, a spatially dependent metamaterial perfect absorber operating in the infrared regime We achieve an experimental absorption of 97% at a wavelength of 60 microns, and our results agree well with numerical full-wave simulations By using two different metamaterial sublattices we experimentally demonstrate a spatial and frequency varying absorption which may have many relevant applications including hyperspectral sub-sampling imaging
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Citations
Suppressing the unwanted resonance mode in a metal-insulator-metal structure using fine-structured gratings
TL;DR: It is numerically present that suppressing the unwanted resonance mode in a metal-insulator-metal (MIM) structure can be achieved by using a fine-structured gold grating, which is useful for design of mid-infrared narrowband filters, emitters, and absorbers.
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Broadband terahertz absorption enabled by coating an ultrathin antireflection film on doped semiconductor.
TL;DR: It is shown that perfect absorption of terahertz wave can be achieved in a compact system where an ultrathin film of lossless dielectric is coated on a doped semiconductor substrate, and the absorption performance of the proposed system is shown to be insensitive to both incident angle and polarization.
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Thermal infrared emitters by plasmonic metasurface
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TL;DR: In this article, an array of sprit-ring resonators as plasmonic metasurface was used to enhance thermal radiation at specific wavelengths, and the emissivity at the resonance can be tuned to blackbody level by tuning the coupling between a sprit ring and a metal substrate.
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Energy conversion within infrared plasmonic absorption metamaterials for multi-band resonance
TL;DR: In this paper, the energy conversion within the cross-shaped plasmonic absorber metamaterials was investigated theoretically and numerically in the infrared range based on the Poynting's theorem of electromagnetic energy.
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An ultra-thin isotropic metamaterial thermal radiator
TL;DR: In this paper, an ultra-thin infrared metamaterial thermal radiator with nearly isotropic emission pattern for a wide range of angles is proposed. But the design is achieved by overlapping both the electric and magnetic resonances in the spectral domain and is insensitive to both TE and TM polarizations.
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Composite Medium with Simultaneously Negative Permeability and Permittivity
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Metamaterial Electromagnetic Cloak at Microwave Frequencies
David Schurig,Jack J. Mock,B.J. Justice,Steven A. Cummer,John B. Pendry,Anthony F. Starr,David R. Smith +6 more
TL;DR: This work describes here the first practical realization of a cloak of invisibility, constructed with the use of artificially structured metamaterials, designed for operation over a band of microwave frequencies.
Near-Optimal Signal Recovery From Random Projections: Universal Encoding Strategies?
Emmanuel J. Candès,Terence Tao +1 more
TL;DR: If the objects of interest are sparse in a fixed basis or compressible, then it is possible to reconstruct f to within very high accuracy from a small number of random measurements by solving a simple linear program.