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Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics

Coherent control of an asymmetric semiconductor quantum well structure

J. F. Dynes, Emmanuel Paspalakis

Published Feb 1, 2007• 2 citations
Publisher

Abstract

Abstract We study coherent control of an asymmetric semiconductor quantum well by simultaneous application of a laser field and its second harmonic. The relative phase of the applied laser fields is externally altered. The electron population and the small signal absorption and dispersion spectra of a weak probe field propagating through such a quantum well structure are computed and are found to be strongly phase dependent. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

DOI
10.1002/pssc.200673260

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Abstract We put forward an efficient three‐wave mixing (TWM) scheme in an asymmetric semiconductor quantum well (SQW) based on intersubband transitions. Using the coupled Schrödinger–Maxwell approach, we derive the corresponding explicit analytical expressions for the input probe and generated TWM signal fields. Such a nonlinear optical process may be used for efficiently generating coherent short‐wavelength radiation in the SQW solid‐state system, which is much more practical than that in atomic system because of its flexible design and the controllable interference strength. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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Abstract Recently it was demonstrated that in atomic vapors weak control beams can manipulate (or switch) the propagation direction of strong light beams [Dawes et al., Science 308, 672 (2005)]. As a semiconductor analog of such all‐optical switching, we present a proposal for similar manipulation and switching in planar semiconductor microcavities. Using a microscopic many‐particle theory, we investigate the spatio‐temporal dynamics of four‐wave mixing signals and related instabilities in these systems. Even though the underlying physical processes are different from atomic systems, we find that microcavities allow for reversible directional manipulation of light. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)