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EnglishErbium activated PbO–ZnO tellurite glasses ((.70TeO2–(30- x)/ZnO–xPbO)0:99–(Er2O3)0.01 (TZPE), (x = 5, 10, 15, 20)) were prepared by a melt quenching process and studied by optical absorption, luminescence, Raman and x-ray absorption spectroscopy measurements as a function of the PbO/ZnO ratio. The glass structure, as monitored by Raman scattering, shows important changes with the PbO/ZnO ratio, attributed to a glass former action of PbO. The local environment of Er3+ ions, as measured by extended x-ray absorption spectroscopy, does not appreciably change as regards the first oxygen shell. However, the intensity of the optical transitions is quite sensitive to the PbO/ZnO ratio, indicating a progressive increase of the site symmetry with the PbO content. The emission probability and radiative lifetime of several excited states of Er3+ ions were calculated using Judd–Ofelt analysis.
| Titolo: | Structural and optical characterization of the local environment of Er3+ ions in PbO–ZnO tellurite glasses |
| Autori: | R. K., Ramamoorthy; A. K., Bhatnagar; F., Rocca; Mattarelli, Maurizio; Montagna, Maurizio |
| Autori Unitn: | |
| Titolo del periodico: | JOURNAL OF PHYSICS. CONDENSED MATTER |
| Anno di pubblicazione: | 2012 |
| Codice identificativo Scopus: | 2-s2.0-84870460178 |
| Codice identificativo ISI: | WOS:000311891100003 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1088/0953-8984/24/50/505101 |
| Handle: | http://hdl.handle.net/11572/96451 |
| Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
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