GaAs/AlGaAs Quantum Well Long Wave length Infrared (LWIR) Detector with a Detectivity Comparable to HgCdTe.

We have achieved the first high responsivity R sub v = 30,000 V/W, high detectivity D* = 1 X 10 sup (10) cm sqrt Hz/W GaAs/AlGaAs multiquantum well superlattice detector which is sensitive in the long wavelength infrared (LWIR) spectral region. This detector operates at lambda = 8.3microns and at a temperature of T = 77K.