| 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: | 8 |
| 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 Opportunities: | Research Projects - SPEC Program |
| FAPESP's process: | 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |