Europium doping in monoclinic KYb(WO₄)₂ crystal

详细信息    查看全文

• 作者：P.A. Loiko^a ; ^b ; E.V. Vilejshikova^b ; X. Mateos^a ; ^{xavier.mateos@urv.cat} ; J.M. Serres^a ; E.B. Dunina^c ; A.A. Kornienko^c ; K.V. Yumashev^b ; M. Aguiló ; ^a ; F. Dí ; az^a
• 关键词：Double tungstates ; Europium ; Absorption ; Luminescence
• 刊名：Journal of Luminescence
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：183
• 期：Complete
• 页码：217-225
• 全文大小：1084 K
• 卷排序：183

文摘

We report on a detailed spectroscopic study of Eu3+ ions in the monoclinic KYb(WO4)2 crystal. The polarized room and low-temperature absorption spectra are measured. The maximum σabs corresponding to the 7F1 → 5D1 transition is 1.32×10–20 cm2 at 534.2 nm with a bandwidth of 0.7 nm (for E||Nm). The Stark sub-levels of the excited mulitplets are determined. A Judd-Ofelt analysis is applied to the Eu3+:KYb(WO4)2 crystal to determine the probability of spontaneous transitions, radiative lifetimes and luminescence branching ratios. Within the strong configuration interaction (SCI) approximation, the intensity parameters are Ω2=4.757, Ω4=2.295, Ω6=1.644 [10–20 cm2] and Δf=50160 cm–1. The radiative lifetime of the 5D0 state is 351 µs. The maximum stimulated-emission cross-section corresponding to the 7F1 → 5D1 transition is 1.44×10–20 cm2 at 703.2 nm (for E||Nm). Under UV excitation, the Eu3+:KYb(WO4)2 crystal provides intense red photoluminescence with CIE coordinates, x=0.675, y=0.325.