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Continuum contribution to excitonic four-wave mixing due to interaction-induced nonlinearities

D. Birkedal, V. G. Lyssenko, J. M. Hvam, and K. El Sayed
Phys. Rev. B 54, R14250(R) – Published 15 November 1996
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Abstract

We present an experimental and theoretical investigation of ultrafast transient four-wave mixing of GaAs/ AlxGa1xAs quantum wells for coherent excitation of exciton and continuum states. The signal appears at the exciton resonance and is shown to consist of two contributions: an intense spectrally narrow part only present for short time delays and a weak exponentially decaying part reflecting the intrinsic coherence properties of the exciton states. The intense part of the signal is due to the excitation of the continuum states mediated by interaction-induced nonlinearities. © 1996 The American Physical Society.

  • Received 6 September 1996

DOI:https://doi.org/10.1103/PhysRevB.54.R14250

©1996 American Physical Society

Authors & Affiliations

D. Birkedal, V. G. Lyssenko, and J. M. Hvam

  • Mikroelektronik Centret, Technical University of Denmark, Building 345 east, DK-2800 Lyngby, Denmark

K. El Sayed

  • Department of Physics, University of Florida, Gainesville, Florida 32611

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Issue

Vol. 54, Iss. 20 — 15 November 1996

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