Influence of Upconversion Processes in the Optically-Induced Inhomogeneous Thermal Behavior of Erbium-Doped Lanthanum Oxysulfide Powders
dc.contributor.author | Balda de la Cruz, Rolindes | |
dc.contributor.author | Hakmeh, Noha | |
dc.contributor.author | Barredo Zuriarrain, Macarena | |
dc.contributor.author | Merdrignac-Conanec, Odile | |
dc.contributor.author | Arriandiaga Abaroa, María Ángeles | |
dc.contributor.author | García Revilla, Sara | |
dc.contributor.author | Fernández Rodríguez, Joaquín Manuel | |
dc.date.accessioned | 2018-02-12T12:44:22Z | |
dc.date.available | 2018-02-12T12:44:22Z | |
dc.date.issued | 2016-05-11 | |
dc.identifier.citation | Materials 9(5) : (2016) // Article ID 353 | es_ES |
dc.identifier.issn | 1996-1944 | |
dc.identifier.uri | http://hdl.handle.net/10810/24963 | |
dc.description.abstract | The efficient infrared-to-visible upconversion emission present in Er-doped lanthanum oxysulfide crystal powders is used as a fine thermal sensor to determine the influence of upconversion processes on the laser-induced thermal load produced by the pump laser and to assess the potentialities of this material in order to obtain anti-Stokes laser-induced cooling. The analysis of the upconversion emission and excitation spectra as well as the decay curves indicates that energy transfer upconversion is the main mechanism responsible for the green (S-4(3/2)) and red (F-4(9/2)) upconversion luminescence. The dependence on temperature of the intensity ratio of upconversion emission from thermally-coupled H-2(11/2) and S-4(3/2) levels of Er3+ in the 240-300 K temperature range has been used to estimate a relative sensitivity of 1.09 x 10(-2) K-1. Thermal measurements performed on the powder samples by using a thermal infrared camera exhibit a very inhomogeneous heat distribution at the sample surface due to the random distribution of the pumping energy inside the sample as well as to the random properties of the thermal field. The analysis of both spectroscopic and thermal measurements show that after a transient heating induced by the background absorption, cooling of discrete regions by means of anti-Stokes processes can be observed. | es_ES |
dc.description.sponsorship | This work was supported by the Spanish Government under project MAT2013-48246-C2-2-P and Basque Country Government IT-943-16. Macarena Barredo-Zuriarrain acknowledges an FPI grant from the Spanish Government. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.subject | laser materials | es_ES |
dc.subject | upconversion | es_ES |
dc.subject | low phonon materials | es_ES |
dc.subject | laser cooling | es_ES |
dc.subject | erbium | es_ES |
dc.subject | ER3+ | es_ES |
dc.title | Influence of Upconversion Processes in the Optically-Induced Inhomogeneous Thermal Behavior of Erbium-Doped Lanthanum Oxysulfide Powders | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). | es_ES |
dc.rights.holder | Atribución 3.0 España | * |
dc.relation.publisherversion | http://www.mdpi.com/1996-1944/9/5/353 | es_ES |
dc.identifier.doi | 10.3390/ma9050353 | |
dc.departamentoes | Física aplicada I | es_ES |
dc.departamentoes | Física aplicada II | es_ES |
dc.departamentoeu | Fisika aplikatua I | es_ES |
dc.departamentoeu | Fisika aplikatua II | es_ES |
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