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Energy transfer between amorphous Si nanoclusters and Er3+ ions in a SiO2 matrix

Abstract : We report on the energy-transfer mechanism between amorphous Si nanoclusters and erbium ions in a SiO2 matrix. We have studied a set of optimized samples which show maximum Er3+ to Si-nc coupling ratio. We demonstrate that the transfer mainly occurs to the 4I112 level in less than 100 ns and that higher Er3+ energetic levels are not involved. Furthermore, we show that there are no traces of Auger back-transfer, excited state absorption, or pair-induced quenching mechanisms in our samples, leading us to propose a model in which the short interaction distance between Si-nc and Er3+ ions is the limiting factor for the noncomplete excitation of the whole Er3+ active population.
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https://hal-cea.archives-ouvertes.fr/cea-00407922
Contributor : Chantal Brassy <>
Submitted on : Monday, July 27, 2009 - 9:22:36 PM
Last modification on : Wednesday, May 6, 2020 - 5:38:23 PM

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  • HAL Id : cea-00407922, version 1

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D. Navarro-Urrios, A. Pitanti, N. Daldosso, Fabrice Gourbilleau, Richard Rizk, et al.. Energy transfer between amorphous Si nanoclusters and Er3+ ions in a SiO2 matrix. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2009, 79, pp.193312. ⟨cea-00407922⟩

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