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Opto-Electronics Review

Editor-in-Chief: Jaroszewicz, Leszek

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1896-3757
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Volume 22, Issue 4

Issues

Wannier-Stark effect and electron-phonon interaction in macroporous silicon structures with SiO2 nanocoatings

L. Karachevtseva
  • V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Nauky Pr., 03028, Kyiv, Ukraine
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/ Yu. Goltviansky
  • V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Nauky Pr., 03028, Kyiv, Ukraine
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/ O. Kolesnyk
  • V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Nauky Pr., 03028, Kyiv, Ukraine
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/ O. Lytvynenko
  • V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Nauky Pr., 03028, Kyiv, Ukraine
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/ O. Stronska
  • V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Nauky Pr., 03028, Kyiv, Ukraine
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Published Online: 2014-09-27 | DOI: https://doi.org/10.2478/s11772-014-0199-6

Abstract

We investigated the contribution of electron-phonon interaction to the broadening parameter Γ of the Wannier-Stark ladder levels in oxidized macroporous silicon structures with different concentration of Si-O-Si states (TO and LO phonons). The obtained value of the Wannier-Stark ladder parameter Γ is much less than the djacent level energy evaluated from giant oscillations of resonance electron scattering on the surface states. We determined the influence of broadening on the oscillation amplitude in IR absorption spectra as interaction of the surface multi-phonon polaritons with scattered electrons. This interaction transforms the resonance electron scattering in samples with low concentration of Si-O-Si states into ordinary scattering on ionized impurities for samples with high concentration of Si-O-Si states. The transformation takes place at the scattering lifetime coinciding with the period of electron oscillations in the surface electric field.

Keywords: Wannier-Stark effect; electron-phonon interaction; macroporous silicon structures; SiO2 nanocoatings

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About the article

Published Online: 2014-09-27

Published in Print: 2014-12-01


Citation Information: Opto-Electronics Review, Volume 22, Issue 4, Pages 201–206, ISSN (Online) 1896-3757, ISSN (Print) 1230-3402, DOI: https://doi.org/10.2478/s11772-014-0199-6.

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© 2014 SEP, Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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