Transient Optical Nonlinearities in Multiple Quantum Well Structures
The temporal responses of two types of excitonic optical non-linearity in multiple quantum well structures are discussed. Picosecond transient grating measurements provide coefficients of nonlinear refraction associated with exciton saturation in room temperature GaAs/AlGaAs structures as well as information on carrier heating and carrier transport, both intra-well and cross-well. The wavelength shift of the exciton feature when carriers are optically generated in an electrically biased GaAs/AlGaAs multiple quantum well structure has allowed an assessment of the nature of the cross-well photocurrent using the picosecond excite-probe method.4
KeywordsDiffraction Efficiency Refractive Index Change Multiple Quantum Optical Bistability Multiple Quantum Well
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- 7.S H Park, J F Morhange, A D Jeffery, R A Morgan, A Chivez-Pirson, H M Gibbs, S W Koch, N Peyghambarian, M Derstine, A C Gossard, J H English and W Wiegman, Measurement of room-temperature band-gap-resonant optical nonlinearities of GaAs/AlGaAs multiple quantum wells and bulk GaAs, Appl. Phys. Lett. 52:1201 (1988).ADSCrossRefGoogle Scholar
- 9.A Miller, R J Manning, P K Milson, D C Hutchings, D W Crust and K Woodbridge, Transient grating studies of excitonic optical nonlinearities in GaAs/AlGaAs multiple quantum wells, J. Opt. Soc. Amer. B. submitted 1988.Google Scholar
- 10.P K Milsom and A Miller, Saturating refractive nonlinearities and optical bistability — implications for excitonic switching, Opt. Quantum Electron. in press 1988.Google Scholar