Resonant Femtosecond Emission from Quantum Well Excitons: The Role of Rayleigh Scattering and Luminescence

S. Haacke, R. A. Taylor, R. Zimmermann, I. Bar-Joseph, and B. Deveaud
Phys. Rev. Lett. 78, 2228 – Published 17 March 1997
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Abstract

We study the ultrafast properties of secondary radiation of semiconductor quantum wells under resonant excitation. We show that the exciton density dependence allows one to identify the origin of secondary radiation. At high exciton densities, the emission is due to incoherent luminescence with a rise time determined by exciton-exciton scattering. For low densities, when the distance between excitons is much larger than their diameter, the temporal shape is independent of density and rises quadratically, in excellent agreement with recent theories for resonant Rayleigh scattering.

  • Received 9 December 1996

DOI:https://doi.org/10.1103/PhysRevLett.78.2228

©1997 American Physical Society

Authors & Affiliations

S. Haacke1, R. A. Taylor2, R. Zimmermann3, I. Bar-Joseph4, and B. Deveaud1

  • 1Institute for Micro- and Optoelectronics, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland
  • 2Physics Department, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
  • 3Institut für Physik, Humboldt-Universität zu Berlin, 10117 Berlin, Germany
  • 4Department of Physics, Weizmann Institute of Science, Rehovot 76100, Israel

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Vol. 78, Iss. 11 — 17 March 1997

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