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Publication Citation: Improved Thermal Detector Coatings for Laser Radiometry at NIST

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Author(s): John H. Lehman;
Title: Improved Thermal Detector Coatings for Laser Radiometry at NIST
Published: February 27, 2006
Abstract: Nearly all of the radiometric standards for laser power and energy measurements at NIST and elsewhere in the world are based on thermal detectors. These detectors usually rely on a thermal absorber coating to enhance the detector responsivity. Ideally the composite detector and coating has low thermal mass (not exceeding that of the detector material) and high absorption efficiency (> 99 %) over a broad range of wavelengths (0.2 'm to 20 'm). We present investigations of the optical absorption and thermal efficiency of advanced coatings based on carbon nanotubes (CNTs). We present a summary of published results and opportunities for future research directed toward developing radiometric standards that are suited to ever-higher power and shorter (that is, ultraviolet) wavelengths.
Conference: MSC 2006 "The Science, Technology, and Control of Measurements"
Location: Anaheim, CA
Dates: February 27-March 3, 2006
Keywords: carbon nanotubes;laser radiometry;optical detectors;thermal detectors
Research Areas: Optoelectronics