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Title

Nanostructuring the Er3+ distribution in PbO–Nb2O5–GeO2 thin film glasses

AuthorsMorea, Roberta ; Miguel, A.; Fernández Navarro, José María ; Gonzalo de los Reyes, José; Fernández, Joaquín ; Balda, Rolindes
KeywordsNanostructured thin films
Photoluminescence
Pulsed laser deposition
Erbium-doping
Lead niobium germanate glass
Issue Date2015
PublisherElsevier
CitationOptical Materials 41: 131-135 (2015)
AbstractNanostructured thin film glasses with a controlled concentration and in-depth distribution of Er3+ have been produced by alternate pulsed laser deposition (PLD) from host (PbO-Nb2O5-GeO2) and dopant (Er) targets (in-situ doping). Their photoluminescence (PL) response is compared to that of doped films grown by standard PLD using Er3+-doped glass targets (ex-situ doping), by studying the characteristic Er3+ emission at 1.53 ¿m. PL intensity of in-situ doped films is maximized for in-depth separation between Er-doped layers ¿ 5 nm, whereas their lifetime is always longer in the case of nanostructured films having a separation between Er3+ ions similar to that of ex-situ doped films. These results stem from the different distribution of Er3+ ions in the host glass: isotropic 3D for ex-situ doped films or planar 2D for nanostructured films. Thus, the number of neighbor Er3+ ions is larger in the first case, which favours the increase of nonradiative deexcitation due to concentration quenching. 2014 Elsevier B.V. All rights reserved.
Description5th International Workshop on Photoluminescence in Rare Earths (PRE'14): Photonic Materials and Devices May 13-16, 2014, San Sebastian, Spain.
Publisher version (URL)http://dx.doi.org/10.1016/j.optmat.2014.10.049
URIhttp://hdl.handle.net/10261/134765
DOI10.1016/j.optmat.2014.10.049
Identifiersdoi: 10.1016/j.optmat.2014.10.049
issn: 0925-3467
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