Two-Wavelength Focal-Plane Array of QWIPs

A proposed focal-plane array (FPA) of quantum-well infrared photodetectors (QWIPs) would exhibit peak response at two wavelengths. Heretofore, single-focal-plane arrays of photodetectors optimized for two or more wavelengths have not been available. This FPA is intended to be a prototype of multispectral imaging devices for a variety of scientific, industrial, and military infrared instruments.