The present invention relates to monolithic visible-or solar-blind photodetectors with
resolved sensitivities in the UV and IR bands. Methods for fabrication of the photodetec tors
and a method for decreasing sensitivity of the integrated structure to visible or solar radiation
are also provided. 2. Description of Related Art Solid-state optical detectors based on
semiconductor mate rials have replaced photoemissive devices in a wide variety of both
commercial and military applications due to their broad spectral responsivity, excellent …

(57) ABSTRACT A photodetector having sensitivity in both an infrared and an ultraviolet
band is provided. The photodetector is formed on a single chip and is designed to be blind
to Solar or visible radiation. Structures disclosed allow fast and efficient detec tion of signals
with high spatial and temporal resolution. Such sensors may be used for multi-pixel focal
arrays and applied for fire detection applications, various space-and military-related
applications and other applications.