Abstract
Much recent progress has been made in the understanding of the optical response of low-dimensional semiconductors. However, additional complications of strong localization and their effects on dynamics and the coherent optical response remain unresolved. Using a highly disordered GaAs single quantum well (width 42 A), we report the nonlinear signal in a self-diffracted transient four-wave mixing (FWM) experiment extending over more than three decades in amplitude as a function of pulse delay [inset of Fig. 1(a)], With that dynamic range, it becomes dear that the decay of the nonlinear signal is biexponential, i.e., with two different values of the decoherence time T2.
© 1998 Optical Society of America
PDF ArticleMore Like This
M. D. Webb, S. T. Cundiff, and D. G. Steel
ME4 International Conference on Ultrafast Phenomena (UP) 1990
S. Arlt, U. Siegner, F. Morier-Genoud, and U. Keller
RMD6 Radiative Processes and Dephasing in Semiconductors (RPDS) 1998
W. Langbein, P. Borri, and J.M. Hvam
RTuB2 Radiative Processes and Dephasing in Semiconductors (RPDS) 1998