Nanostructuring the Er3+ distribution in PbO–Nb2O5–GeO2 thin film glasses
| Autor: | J.M. Fernández-Navarro, Rolindes Balda, R. Morea, José Gonzalo, A. Miguel, José A. Fernández |
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| Přispěvatelé: | CSIC-JA-USE - Centro Nacional de Aceleradores (CNA), Ministerio de Ciencia e Innovación (España) |
| Rok vydání: | 2015 |
| Předmět: |
Photoluminescence
Materials science Dopant Nanostructured thin films Organic Chemistry Doping Analytical chemistry Pulsed laser deposition Erbium doping Lead niobium germanate glass Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Ion Inorganic Chemistry Concentration quenching Electrical and Electronic Engineering Physical and Theoretical Chemistry Thin film Erbium-doping Spectroscopy |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 0925-3467 |
| Popis: | 5th International Workshop on Photoluminescence in Rare Earths (PRE'14): Photonic Materials and Devices May 13-16, 2014, San Sebastian, Spain. Nanostructured 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. A. Miguel and R. Morea acknowledge FPI grants from the Spanish Government. This work has been supported by the Spanish Government (Projects MAT2009-14282-C02-01, MAT2009-14282-C02-02, TEC2012-38901-C02-01). |
| Databáze: | OpenAIRE |
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