dc.contributor | Universidade Federal de Alagoas (UFAL) | |
dc.contributor | Universidade Federal Rural de Pernambuco (UFRPE) | |
dc.contributor | Marechal Deodoro Unit | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T15:22:38Z | |
dc.date.accessioned | 2022-10-05T16:17:41Z | |
dc.date.available | 2014-05-20T15:22:38Z | |
dc.date.available | 2022-10-05T16:17:41Z | |
dc.date.created | 2014-05-20T15:22:38Z | |
dc.date.issued | 2003-05-01 | |
dc.identifier | Journal of Luminescence. Amsterdam: Elsevier B.V., v. 102, p. 755-761, 2003. | |
dc.identifier | 0022-2313 | |
dc.identifier | http://hdl.handle.net/11449/33580 | |
dc.identifier | 10.1016/S0022-2313(02)00637-3 | |
dc.identifier | WOS:000182376000137 | |
dc.identifier | 6446047463034654 | |
dc.identifier | 2998503841917815 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3905884 | |
dc.description.abstract | Temperature investigation of infrared-to-visible frequency upconversion in erbium-doped tellurite glasses excited by CW laser radiation at 1540 nm and under cryogenic temperatures is reported. Intense upconversion emission signals around 530, 550 and 660 nm corresponding to the H-2(11/2), S-4(3/2), and F-4(9/2) transitions to the I-4(15/2) ground state were generated and studied as a function of the laser intensity and temperature. The upconversion excitation mechanism of the Er3+ ions emitting energy levels was accomplished via stepwise multiphoton absorption. The green upconversion luminescence exhibited a fivefold intensity enhancement when the temperature of the sample was varied in the range between 5 and 300 K. A maximum green upconversion intensity was attained around 120 K and a steady decreasing behavior for higher temperatures up to 300 K was observed. A model based upon conventional rate equations was used to model the observed temperature evolution of the upconversion luminescence. (C) 2002 Elsevier B.V. B.V. All rights reserved. | |
dc.language | eng | |
dc.publisher | Elsevier B.V. | |
dc.relation | Journal of Luminescence | |
dc.relation | 2.732 | |
dc.relation | 0,694 | |
dc.rights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | upconversion | |
dc.subject | glass | |
dc.subject | rare earth | |
dc.title | Temperature investigation of infrared-to-visible frequency upconversion in erbium-doped tellurite glasses excited at 1540 nm | |
dc.type | Artigo | |