"Microlens" System Could Significantly Boost Imaging Power.
Popular Science (5/18, Dillow) reports that, by "taking advantage of the unique properties of gold at the nanoscale, scientists [at Rensselaer Polytechnic Institute] have created a 'microlens' system that could boost detectivity in quantum-dot-based IR detectors by 20 times." The "quantum dot infrared photodetectors (QDIPs)" that the researchers utilized "have long, flat surfaces covered with a thin layer of gold about 50 nanometers thick" and are covered with "tiny holes" containing quantum dots. "The layer of gold focuses the incoming light into each hole more directly, strengthening the contact with the quantum dots inside." While such devices could have numerous applications, "a 20-fold increase in our ability to scan the heavens in infrared could help astronomers see things that are currently invisible to our best IR telescopes."
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