Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Ultraviolet Upconversion Luminescence in a Highly Transparent Triply-Doped Gd3+-Tm3+-Yb3+ Fluoride-Phosphate Glasses

Full text
Author(s):
Galleani, Gustavo [1, 2] ; Santagneli, Silvia Helena [1, 2] ; Ledemi, Yannick [3, 4] ; Messaddeq, Younes [3, 4, 1, 2] ; Janka, Oliver [5] ; Poettgen, Rainer [5] ; Eckert, Hellmut [6, 7]
Total Authors: 7
Affiliation:
[1] Sao Paulo State Univ, UNESP, Photon Quebec Brazil Joint Int Res Unit, BR-13566590 Araraquara, SP - Brazil
[2] Sao Paulo State Univ, UNESP, Inst Chem, BR-13566590 Araraquara, SP - Brazil
[3] Univ Laval, Photon Quebec Brazil Joint Int Res Unit, Quebec City, PQ G1V 0A6 - Canada
[4] Univ Laval, Ctr Opt Photon & Lasers, Quebec City, PQ G1V 0A6 - Canada
[5] WWU, Inst Anorgan & Analyt Chem, D-48149 Munster - Germany
[6] WWU, Inst Phys Chem, D-48149 Munster - Germany
[7] Univ Sao Paulo, Inst Fis Sao Carlos, BR-05508020 Sao Carlos, SP - Brazil
Total Affiliations: 7
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 122, n. 4, p. 2275-2284, FEB 1 2018.
Web of Science Citations: 6
Abstract

We report near-infrared to ultraviolet (UV) upconversion emissions in triply-doped Gd3+-Tm3+-Yb3+ fluoride-phosphate glasses. Emission at 310 nm, originated from the Gd3+:P-6(7/2) -> S-8(7/2) transition, was observed for the first time in glasses. The high-purity glasses prepared exhibit extended transparency in the UV down to 200-250 nm. The mixed fluoride-phosphate environment of the rare-earth ions was characterized by means of NMR techniques using scandium as a diamagnetic mimic for the luminescent species, for which the ligand distribution was quantified by Sc-45[P-31] rotational echo double resonance NMR. Both the intensity of the Gd3+ emission as well as those of the UV emissions at 290, 347, and 363 nm increase with increasing ratio of fluoride to phosphate ligands coordinating to the rare-earth ion. (AU)

FAPESP's process: 15/22828-6 - Pushing the boundaries of optical fibers: from photonics to optogenetics and environmental monitoring
Grantee:Younes Messaddeq
Support type: Research Projects - SPEC Program
FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC