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Material Absorbs Nearly 100% of IR Light

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CAMBRIDGE, Mass., Nov. 27, 2012 — An ultrathin, tunable device developed at Harvard absorbs 99.75% of infrared light on demand and, when activated, looks like a black blob to IR cameras. The near-perfect absorber could expand the possibilities for energy harvesting and thermal detection. Designed by scientists at the School of Engineering and Applied Sciences (SEAS) and at the University of California, San Diego, the instrument is composed of a 180-nm-thick layer of vanadium dioxide on a sheet of sapphire. Although scientists have created many perfect absorbers before, none have had such versatile properties, the...Read full article

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