Visible-extended InP/InGaAs wide spectrum response infrared detectors
摘要
Standard InP/In0.53Ga0.47As short wavelength detectors has important application in high performance night vision owing to special spectrum response from 0.87 to 1.7 m. In order to fully utilize the visible irradiation energy of night sky glow, the response wavelength can be extended to visible with the standard InP/In0.53Ga0.47As detector. By combining material structure design and substrate thinning processing technology, 320256 visible-extended InGaAs wide spectrum detector were successfully prepared. Based on the detector, imagery demonstration was finished with different band filters. Different characterized information for the same target were indicated by detecting via short wavelength and visible filter respectively, at the same time, both visible and short wavelength information were obtained by wide spectrum detecting without band filter, the imagery behaved as visible and short wavelength dual band detecting. Consequently, target information and the recognition rate for the target will be improved dramatically by the visible-extended wide spectrum detector.