Two-wavelength demultiplexing p-i-n GaAs/AlAs photodetector using partially disordered multiple quantum well structures

Abstract
A novel two‐wavelength pin demultiplexer is proposed and fabricated using dopant‐free partial disordering of GaAs/AlAs quantum wells by rapid thermal annealing. A crosstalk attenuation of 41 dB and an interchannel spacing of 69 nm were achieved in the 0.8 μm wavelength region.