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

Link to the original source: https://www.osapublishing.org/ome/abstract.cfm?uri=ome-7-2-527

Article's DOI: 10.1364/OME.7.000527

Entity: Universitat Rovira i Virgili

Journal publication year: 2017

First page: 527

Publication Type: Article Artículo Article