Tunable upconversion emission in NaLuF4–glass-ceramic fibers doped with Er3+ and Yb3+

Giulio Gorni , Jose J. Velázquez , Marcin Kochanowicz , Dominik Dorosz , R. Balda , J. Fernández , A. Durán , M. J. Pascual

Abstract

Novel glass-ceramic optical fibers containing NaLuF4 nanocrystals doped with 0.5ErF3 and 2YbF3 (mol%) have been prepared by the rod-in-tube method and controlled crystallization. NaLuF4 nanocrystals with a size around 20 nm are obtained after heat treatment at 600 °C. Intense upconverted green and red emissions due to (²H11/2, ⁴S3/2) → ⁴I15/2 and ⁴F9/2 → ⁴I15/2 transitions, respectively, together with a blue emission due to ²H9/2 → ⁴I15/2 transition have been observed under excitation at 980 nm. The intensity of the green and red upconversion bands shows a nearly linear dependence on the excitation power which can be explained by saturation effects in the intermediate energy states and proves that a sensitized energy transfer upconversion process is responsible for the population of the emitting levels of Er³⁺ ions. The upconversion emission color changes from yellow to green by increasing the excitation power density which allows to manipulate the color output of the Er³⁺ emission in the glass-ceramic fibers. The tunable emission color is easily detected with the naked eye. This interesting characteristic makes these glass-ceramic fibers promising materials for photonic applications.
Author Giulio Gorni
Giulio Gorni,,
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, Jose J. Velázquez
Jose J. Velázquez,,
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, Marcin Kochanowicz (FEE / DEPEPLT)
Marcin Kochanowicz,,
- Department of Electrical Power Engineering, Photonics and Lighting Technology
, Dominik Dorosz
Dominik Dorosz,,
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, R. Balda
R. Balda,,
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, J. Fernández
J. Fernández,,
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, A. Durán
A. Durán,,
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, M. J. Pascual
M. J. Pascual,,
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Journal seriesRSC Advances, ISSN 2046-2069, (N/A 100 pkt)
Issue year2019
No9
Pages31699-31707
Publication size in sheets0.5
ASJC Classification1500 General Chemical Engineering; 1600 General Chemistry
DOIDOI:10.1039/C9RA05182A
Internal identifierROC 19-20
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 17-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.736; WoS Impact Factor: 2018 = 3.049 (2) - 2018=3.168 (5)
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