Influence of excitation light on the frequency upconversion of trivalent lanthanide ions

The upconversion mechanisms of the 1D 2 level of Tm 3+ ion under different excitation lights were analyzed. The influences of the excitation lights on the upconversion process, nonradiative relaxation from level 3F 2 to 3H 4 and fluorescence properties were investigated. It was shown that the one-co...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2010-11, Vol.405 (22), p.4706-4712
Main Authors: Fu, Zhenxing, Zheng, Hairong, Tian, Yu, Zhang, Zhenglong, Cui, Min
Format: Article
Language:English
Subjects:
Amorphous materials, glasses and other disordered solids
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Crystals
Exact sciences and technology
Excitation
Excitation light
Fluorescence
Frequency domains
Frequency upconversion
Lanthanides
Nanocrystals and nanoparticles
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Photoluminescence
Physics
Spectroscopy
Trivalent thulium ion
Upconversion
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Summary:The upconversion mechanisms of the 1D 2 level of Tm 3+ ion under different excitation lights were analyzed. The influences of the excitation lights on the upconversion process, nonradiative relaxation from level 3F 2 to 3H 4 and fluorescence properties were investigated. It was shown that the one-color cw excitation could affect the profile of fluorescence, while information of the nonradiative relaxation could not be extracted. The nonradiative relaxation rate measured with the one-color pulsed excitation in crystal phase was in agreement with what was obtained in the free-standing nanometer crystal particles through the two-color pulsed excitation. The characteristics of the fluorescent emissions of Tm 3+ ions doped in various host materials were also discussed under different excitation lights. As a result of the discussion, a possible way to obtain nonradiative relaxation rate directly from a spectroscopic method in frequency domain was proposed. The study can be extended to other trivalent lanthanide ions that have upconversion through excited state absorption.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2010.08.068