A nanomechanical membrane with a broadband platinum absorber reaches a specific detectivity of 3.8 x 10^9 cm sqrt(Hz)/W, within a factor of three of the thermal fluctuation limit for a perfect 50% absorber.
Infrared detectors: an overview
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Uncooled Thermal Infrared Detection Near the Fundamental Limit Using a Nanomechanical Resonator with a Broadband Absorber
A nanomechanical membrane with a broadband platinum absorber reaches a specific detectivity of 3.8 x 10^9 cm sqrt(Hz)/W, within a factor of three of the thermal fluctuation limit for a perfect 50% absorber.