Numéro
J. Phys. Colloques
Volume 49, Numéro C2, Juin 1988
Optical Bistability - IV
Page(s) C2-237 - C2-240
DOI https://doi.org/10.1051/jphyscol:1988256
Optical Bistability - IV

J. Phys. Colloques 49 (1988) C2-237-C2-240

DOI: 10.1051/jphyscol:1988256

GEOMETRICAL DEPENDENCE OF TRANSIENT NONLINEARITIES IN MULTIPLE QUANTUM WELL STRUCTURES

R.J. MANNING1, A. MILLER1, D.W. CRUST2 et K. WOODBRIDGE3

1  Royal Signals and Radar Establishment, St Andrews Road, GB-Great Malvern WR14 3PS, Worcestershire, Great-Britain
2  Department of Physics, University of St Andrews, GB-Fife KY16 9SS, Great-Britain
3  Philips Research Laboratory, Cross Oak Lane, GB-Redhill RH1 5HA, Surrey, Great-Britain


Abstract
The transient grating technique has been used with sub-picosecond pulses to study the magnitude, dynamics and saturation of the excitonic non-linear refraction in room temperature GaAs/AlGaAs multiple quantum wells. The dependence of grating decay time with sample orientation in the phase conjugate geometry, was measured and interpreted in terms of intra-well and cross-well contributions to the highly anisotropic carrier diffusion.