Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1996),
  • paper QWG2

The effects of momentum scattering on exciton motion: observation of nondiffusive transport

Not Accessible

Your library or personal account may give you access

Abstract

In the study of exciton motion in semiconductors and molecular crystals, it is usually assumed that the mean free path is sufficiently short compared with the relevant length scale that diffusive behavior, governed by Fick's law, is expected. In this case, the exponential decay in time of an optically created grating (e.g., in four-wave mixing, FWM) has a quadratic dependence on the inverse the text with n = 1.6 (nondiffusive behavior). Solid curve: a quadratic fit, shown for comparison. Upper inset: dependence of the exponent n on the momentum scattering rate as indicated by the absorption linewidth (HWHM). Note the transition to diffusive behavior for larger linewidths (scattering rates).

© 1996 Optical Society of America

PDF Article
More Like This
Nondiffusive excitonic transport in GaAs: evidence for polariton propagation

A. C. Schaefer, J. Erland, D. G. Steel, and Harrison M. Randall
QWC6 Quantum Electronics and Laser Science Conference (CLEO:FS) 1995

Effect of magnetic confinement on many- body nonlinearities of Lorentzian excitons

Peter Kner, Shimshon Bar-Ad, Maria V. Marquezini, and Daniel S. Chemla
QThG6 Quantum Electronics and Laser Science Conference (CLEO:FS) 1996

Coherence Transfer in Exciton-Exciton Scattering in a Semiconductor Microcavity

J.-K. Rhee, T.B. Norris, D.S. Citrin, Y. Arakawa, M. Nishioka, and E. Hanamura
ThB.1 International Conference on Ultrafast Phenomena (UP) 1996

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved