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Control of infrared cross-relaxation in LiNbO3:Tm3+ through high-pressure

Abstract: The cross-relaxation process between the lower excited states of thulium ions has a strong influence on its main infrared emissions, but also in the population of higher excited states that lead to characteristic blue upconversion. This work investigates this process in LiNbO3:Tm3+ by means of time-resolved spectroscopy at high pressure. It is demonstrated that through the application of high-pressure it is possible to enhance its probability and to investigate its influence on the photoluminescence spectra and corresponding lifetimes of Tm3+. The results are analyzed in terms of the effect of high pressure on parameters such as Tm3+-Tm3+ distance through the equation-of-state of LiNbO3, refractive index or Tm3+- Tm3+ energy transfer characteristics (absorption/emission overlap integral), to conclude that the major multipole interaction responsible for crossrelaxation is the quadrupole-quadrupole interaction. This conclusion supports and clarifies previous dynamical models for energy transfer on the basis of spectroscopic studies carried out in LiNbO3:Tm3+ as a function of Tm3+ concentration. © 2015 Optical Society of America.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Optical Materials Express Vol. 5, Issue 5, pp. 1168-1182 (2015)

Editorial: OSA, Optical Society of America

 Año de publicación: 2015

Nº de páginas: 15

Tipo de publicación: Artículo de Revista

 DOI: 10.1364/OME.5.001168

ISSN: 2159-3930

Proyecto español: S2009/TIC-1476 ; MAT2012-34919 ; MAT2012-38664-C02-1 ; CDS2007-0045

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