Journal
PHYSICAL REVIEW B
Volume 79, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.045131
Keywords
infrared imaging; metamaterials
Funding
- AFOSR MURI [FA9550-06-1-0279, FA9550-08-1-0394]
- NSF NIRT [0709323]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0709323] Funding Source: National Science Foundation
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A metamaterial-based approach in 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 PIMNIM that is subwavelength in all three dimensions enables absorption close to 100% for incidence angles up to 45 degrees 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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