Author, as appears in the article.: JOAN J. CARVAJAL; YEAN-SHENG YONG; SHANMUGAM ARAVAZHI; SERGIO A. VÁZQUEZ CÓRDOVA; FRANCESC DÍAZ; JENNIFER L. HEREK; SONIA M. GARCÍA-BLANCO; MARKUS POLLNAU
Department: Química Física i Inorgànica
URV's Author/s: CARVAJAL MARTÍ, JOAN JOSEP; YEAN-SHENG YONG; SHANMUGAM ARAVAZHI; SERGIO A. VÁZQUEZ CÓRDOVA; DÍAZ GONZÁLEZ, FRANCISCO MANUEL; JENNIFER L. HEREK; SONIA M. GARCÍA-BLANCO; MARKUS POLLNAU
Keywords: Tungsten compounds Light luminescence potassium
Abstract: Radiation trapping occurs in rare-earth-doped active media with strong spectral overlap of luminescence and ground-state absorption. It is demonstrated experimentally that a confocal measurement mitigates the influence of radiation trapping on the measured luminescence lifetime, hence allowing for direct extraction of the lifetime from the measured decay curves. The radiation trapping effect is largely suppressed by probing a small sample volume and rejecting the photons reemitted from the unpumped region. This non-destructive measurement method is applied to ytterbium (Yb3+) activated potassium double tungstate crystalline layers with Yb3+ concentrations ranging from 1.2 at.% up to 76 at.% (~8 × 1019 - 5 × 1021 cm-3). The measured lifetime values are comparable to the results reported for Yb3+-doped potassium double tungstate powder diluted in liquid.
Research group: Física i Cristal·lografia de Nanomaterials Física i Cristal.lografia de Materials
Thematic Areas: Chemistry Química Química
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 2159-3930
Author identifier: 0000-0002-4389-7298; n/a; n/a; n/a; 0000-0003-4581-4967; n/a; n/a; n/a
Record's date: 2017-02-23
Last page: 532
Journal volume: 7
Papper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Entity: Universitat Rovira i Virgili
Journal publication year: 2017
First page: 527
Publication Type: Article Artículo Article
Repositori URV