FPA and Camera Based on Dualband Infrared SLS Photodiodes

In Phase I, we developed a novel infrared photodiode based on Type-II InAs/GaSb strained layer superlattices (SLS) which demonstrated pingpong dualband action, wherein the spectral response of the diode was switched between midwave (~ 5 micron cutoff) and longwave (~ 10 micron cutoff) infrared by the polarity of the voltage bias applied across it. In Phase II, we will improve quantum efficiency in each band, fabricate 320x256 focal plane arrays with high array uniformity and pixel operability, and integrate and deliver a compact portable camera with two pluggable sensor cartridges. This plug-and-play camera will enable the Navy to test this new dualband sensor technology in the field.