C. Dematos et al., FE-DOPED INGAAS INGAASP PHOTOREFRACTIVE MULTIPLE-QUANTUM-WELL DEVICESOPERATING AT 1.55 MU-M/, Applied physics letters, 70(26), 1997, pp. 3591-3593
Results on semi-insulating photorefractive multiple quantum well (MQW)
devices operating without trapping layers are reported. The device st
ructure consists of a MQW doped with Fe (10(17) cm(-3)) isolated from
the doped contact by intrinsic standoff layers. The photocarriers gene
rated by the pump pulse are trapped in the MQW and screen the applied
electric field in the MQW. Output diffraction efficiency of 0.2% is me
asured in a nondegenerate four-wave-mixing configuration and the rise
time of the diffraction signal reaches 200 ns. (C) 1997 American Insti
tute of Physics.