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 Dates: February 27-March 3, 2006
Conference Location: Anaheim, CA
Conference Title: MSC 2006 "The Science, Technology, and Control of Measurements"
Pub Type: Conferences
carbon nanotubes, laser radiometry, optical detectors, thermal detectors