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Quantum-mechanical versus semiclassical capture and transport properties in quantum well laser structures

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Abstract

We have studied experimentally and modelled theoretically the capture properties and transport mechanisms of electrons and holes in laser structures. We describe first the extreme case where the barrier thickness is very large: then semiclassical drift-diffusion equations may be applied and quantum-mechanical effects at the edge of the well are negligible. A second extreme case occurs when the barrier is narrow enough for quantum mechanics to apply fully. There, strong variations of the capture time with the well width are expected and observed. In real laser structures, dimensions are such that we are in an intermediate case and both aspects have to be taken into account. We give some typical values for diffusion/capture mechanism induced delay times in such a case.

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Author notes

  1. B. Deveaud

    Present address: Institut de Microoptoelectronique, CE Ecublens, Ecole Polytechnique Fédérale de Lausanne, CH 1015, Lausanne, Switzerland

  2. D. Morris

    Present address: Department de Physique, Université de Sheerbrooke, Sheerbrooke, Canada

Authors and Affiliations

  1. CNET, LAB/OCM, France Telecom, 22301, Lannion, France

    B. Deveaud, D. Morris & A. Regreny

  2. AT&T Bell Laboratories, 07974, Murray Hill, NJ, USA

    M. R. X. Barros & P. Becker

  3. CNET, PAB/PMM, France Telecom, 22301, Bagneux, France

    J. M. Gérard

Authors
  1. B. Deveaud
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  2. D. Morris
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  4. M. R. X. Barros
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  5. P. Becker
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  6. J. M. Gérard
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Deveaud, B., Morris, D., Regreny, A. et al. Quantum-mechanical versus semiclassical capture and transport properties in quantum well laser structures. Opt Quant Electron 26, S679–S689 (1994). https://doi.org/10.1007/BF00326655

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  • DOI: https://doi.org/10.1007/BF00326655

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