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Exciton related optical absorption in a spherical quantum dot

The European Physical Journal B volume 87, Article number: 265 (2014) Cite this article

Abstract

An exciton in a spherical quantum dot is studied analytically within the effective mass approximation. A parabolic confinement under an electric field is considered. The linear and nonlinear optical absorption coefficients are calculated within the density matrix formalism. No assumptions are made about the strength of the confinement. It is shown how the competing mechanisms of the Coulomb interaction, the confinement and the applied static electric field affect the optical absorption.

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Authors and Affiliations

  1. Department of Physics, Yeditepe University, Kayısdagı, Atasehir, 34755, Istanbul, Turkey

    Ertan Aksahin & Vildan Ustoglu Unal

  2. Department of Physics, Middle East Technical University, 06531, Ankara, Turkey

    Mehmet Tomak

Authors
  1. Ertan Aksahin
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  2. Vildan Ustoglu Unal
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  3. Mehmet Tomak
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Correspondence to Vildan Ustoglu Unal.

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Aksahin, E., Ustoglu Unal, V. & Tomak, M. Exciton related optical absorption in a spherical quantum dot. Eur. Phys. J. B 87, 265 (2014). https://doi.org/10.1140/epjb/e2014-50305-0

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  • DOI: https://doi.org/10.1140/epjb/e2014-50305-0

Keywords

  • Solid State and Materials