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Titolo:
ULTRAVIOLET EMISSIONS FROM GD3-TRANSFER FROM PAIRS OF PHOTOEXCITED ER3+ IONS - UP-CONVERSION LUMINESCENCE FROM CSMGCL3 CRYSTALS DOPED WITH GD3+ AND ER3+( IONS EXCITED BY ENERGY)
Autore:
GHARAVI AR; MCPHERSON GL;
Indirizzi:
TULANE UNIV,DEPT CHEM NEW ORLEANS LA 70118
Titolo Testata:
Journal of the Optical Society of America. B, Optical physics
fascicolo: 5, volume: 11, anno: 1994,
pagine: 913 - 918
SICI:
0740-3224(1994)11:5<913:UEFGFP>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
COUPLED PAIRS; UP-CONVERSION; ER-3+ IONS; CSCDBR3 CRYSTALS; FIBER LASER; CSMGBR3; GREEN; BLUE; DYNAMICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
A.R. Gharavi e G.L. Mcpherson, "ULTRAVIOLET EMISSIONS FROM GD3-TRANSFER FROM PAIRS OF PHOTOEXCITED ER3+ IONS - UP-CONVERSION LUMINESCENCE FROM CSMGCL3 CRYSTALS DOPED WITH GD3+ AND ER3+( IONS EXCITED BY ENERGY)", Journal of the Optical Society of America. B, Optical physics, 11(5), 1994, pp. 913-918

Abstract

Crystals Of CSMgCl3 containing Gd3+ and Er3+ exhibit UV emissions from excited Gd3+ ions when the 4S3/2(E) (546-nm) and the 2H11/2(F) (522-nm) states of Er3+ are pumped by pulsed laser excitation. The Gd3+ long-lived emissions that appear at 281 nm (tau = 6 ms) and 313 nm (7 = 3ms) are assigned to the 6I7/2(C) and the 6P7/2(A) states, respectively. The luminescence dynamics indicate that the excited Gd3+ ions are produced by cooperative energy transfer from excited pairs of Er3+ ions. Direct excitation of the 4G9/2(T) state of Er3+ at 277 nm is shown to sensitize the Gd3+ emission at 281 nm. Excitation spectra that are observed when pumping the Er3+ states while monitoring the Gd3+ emissions indicate that there are spectroscopically distinct Er3+-Gd3+ clusters with slightly different absorption energies and noticeably different emission dynamics.

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Documento generato il 23/09/18 alle ore 08:56:23