Laser induced broad band anti-Stokes white emission from LiYbF4 nanocrystals

Spectroscopic properties of tetragonal LiYbF_4 nanocrystals under high dense NIR excitation at vacuum condition were investigated. White, broad band emission covering whole visible part of the spectrum from LiYbF_4 nanocrystals was observed. Its intensity strongly depended on the excitation power, e...

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Published inJournal of rare earths Vol. 34; no. 3; pp. 227 - 234
Main Authors Marciniak, L., Tomala, R., Stefanski, M., Hreniak, D., Strek, W.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2016
Subjects
fluorides
rare earths
up-conversion
white emission
光谱性能
动力学分析
反斯托克斯
宽带发射
激光诱导
激发波长
白光
纳米晶体
white emission
fluorides
up-conversion
rare earths
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Summary:Spectroscopic properties of tetragonal LiYbF_4 nanocrystals under high dense NIR excitation at vacuum condition were investigated. White, broad band emission covering whole visible part of the spectrum from LiYbF_4 nanocrystals was observed. Its intensity strongly depended on the excitation power, excitation wavelength and ambient pressure. Temperature of the nanocrystals under 975 nm excitation was determined as a function of excitation power. Strong photo-induced current was observed from LiYbF_4 pallet. The emission kinetic was analyzed. The mechanism of the anti-Stokes white emission was discussed in terms of the laser-induced charge transfer emission from Yb~（2＋） states.
Bibliography:11-2788/TF
L. Marciniak, R. Tomala, M. Stefanski, D. Hreniak, W. Strek （Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland）
Spectroscopic properties of tetragonal LiYbF_4 nanocrystals under high dense NIR excitation at vacuum condition were investigated. White, broad band emission covering whole visible part of the spectrum from LiYbF_4 nanocrystals was observed. Its intensity strongly depended on the excitation power, excitation wavelength and ambient pressure. Temperature of the nanocrystals under 975 nm excitation was determined as a function of excitation power. Strong photo-induced current was observed from LiYbF_4 pallet. The emission kinetic was analyzed. The mechanism of the anti-Stokes white emission was discussed in terms of the laser-induced charge transfer emission from Yb~（2＋） states.
fluorides; white emission; up-conversion; rare earths
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(16)60018-2