Multi-wavelength infrared detection realized with two distinct superlattices, separated by a blocking barrier

Summary form only given. A detector with two distinct superlattices separated by a blocking barrier was investigated for multi-wavelength infrared detection. We show the band structure of our detector. It contains sequentially a 500 nm bottom contact layer, a 14-period bottom superlattice, a blocking barrier, another 14-period top superlattice, and a 400 nm top contact layer. Each period of the bottom and top superlattices is respectively composed of 6 nm GaAs well and 4 nm Al/sub 0.27/Ga/sub 0.73/As barrier.