Phys. Rev. B 79, 045131 (2009) [5 pages]Wide-angle infrared absorber based on a negative-index plasmonic metamaterialReceived 5 December 2008; published 30 January 2009 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° 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.79.045131
DOI:
10.1103/PhysRevB.79.045131
PACS:
78.20.Ci, 42.25.Bs, 42.70.−a, 78.20.Bh
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