Ultrafast dephasing of excitons in semiconductor quantum wells is important because it presents insight into fundamental interactions and possible coherent control of optical properties. Standard measurement techniques include time- and frequency-domain four-wave mixing, resonant Rayleigh scattering, and Faraday rotation. We report on a new time-resolved technique based on reflective probing of pump-induced transient linear birefringence. This has various advantages, including sensitivity, applicability to opaque as-grown samples, ease of implementation, and freedom from superimposed signals.

© 1996 Optical Society of America

PDF Article
More Like This
Ultrafast coherent control of exciton and spin dynamics in quantum wells

AP Heberle, JJ Baumberg, K Kohler, and K Ploog
WL21 International Quantum Electronics Conference (IQEC) 1996

Ultrafast coherent exciton- and spin-control in quantum wells

Albert P. Heberle, Jeremy J. Baumberg, Klaus Köhler, and Klaus Ploog
CMB4 Conference on Lasers and Electro-Optics (CLEO) 1996

Spin dynamics and homogeneous linewidth of free excitons in GaAs quantum wells

Vivek Srinivas, Yung Jui Chen, and Colin E. C. Wood
QTuB2 Quantum Electronics and Laser Science Conference (QELS) 1993