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The role of Er3+–Er3+ separation on the luminescence of Er–doped Al2O3 films prepared by pulsed laser deposition

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5 Author(s)
Serna, R. ; Instituto de Optica, C.S.I.C., Serrano 121, 28006 Madrid, Spain ; de Castro, M.Jimenez ; Chaos, J.A. ; Afonso, C.N.
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Erbium-doped Al2O3 films have been deposited in a single step process by pulsed laser deposition using independent ablation of Al2O3 and Er targets. This procedure allows to control the Er3+ ions in-depth distribution. The characteristic Er3+ photoluminescence at 1.54 μm shows lifetime values which increase from 6.0 to 7.1 ms when the Er3+–Er3+ in-depth separation is increased from 3 to 9 nm. These results are discussed in terms of the ion–ion interaction and clustering for separations shorter than 6 nm. © 1999 American Institute of Physics.

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Applied Physics Letters  (Volume:75 ,  Issue: 26 )