Abstract

Large nonreciprocal energy transfer has been demonstrated in semi-insulating multiple quantum wells for dc applied fields much larger than the diffusion field and much smaller than the space-charge-limiting field.¹ The photorefractive phase shift necessary for energy transfer has been predicted to result from hot-electron nonlinearity.² Inclusion of nonlinear velocity-field dependence leads to a space-charge field that depends on a nonlinear transport length

© 1995 Optical Society of America