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Energy Transfer Between Two Sites in Nd3+:KLiYF5

Published online by Cambridge University Press:  15 February 2011

H. Weidner ,
P. L. Summers ,
R. E. Peale  and
B. H. T. Chai
H. Weidner
Affiliation:
University of Central Florida, Department of Physics, Orlando, FL 32816
P. L. Summers
Affiliation:
University of Central Florida, Department of Physics, Orlando, FL 32816
R. E. Peale
Affiliation:
University of Central Florida, Department of Physics, Orlando, FL 32816
B. H. T. Chai
Affiliation:
University of Central Florida, Center for Research and Education in Optics and Lasers, Orlando, FL 32826
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Abstract

High resolution spectroscopy of Nd3+ in Potassium Lithium Yttrium Fluoride (KLiYF5 ) at ≤80 K reveals two crystal-field sites which are equally populated independent of concentration. Site selective excitation of photoluminescence distinguishes each site's contribution to the spectra. The analysis of integrated line intensities reveals a bidirectional energy transfer between Nd3+ ions in different sites. A rapid increase in transfer rate with increasing Nd concentration is explained only if non-radiative transfer via exchange interaction contributes strongly to the effect. The observed relative decrease with increasing concentration of those emission lines which overlap strongly with opposite-site absorption lines implies that radiative transfer is also important. The energy transfer strongly depends on temperature (2 K – 80 K) which indicates the participation of phonons.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 329: Symposium R – New Materials for Advanced Solid State Lasers , 1993 , 135
Copyright
Copyright © Materials Research Society 1994

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