Glass Technology Laboratory, Council of Scientific and Industrial Research, Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata, 700032, India.
J Fluoresc. 2010 Jan;20(1):425-34. doi: 10.1007/s10895-009-0562-z. Epub 2009 Oct 23.
This paper reports on the preparation and systematic analysis of energy transfer mechanisms in Nd(3+)-Yb(3+)-Er(3+) co-doped new series of barium-alumino-metaphosphate glasses. The time resolved fluorescence of Nd(3+) in triply doped Ba-Al-metaphosphate glasses have revealed that, Yb(3+) ions could function as quite efficient bridge for an energy transfer between Nd(3+) and Er(3+) ions. As a result, a fourfold emission enhancement at 1.54 mum of Er(3+) ions has been achieved through an excitation of (4)F(5/2) level of Nd(3+) at 806 nm for the glass having 3 mol% Yb(3+) with an energy transfer efficiency reaching up to 94%. Decay of donor (Nd(3+)) ion fluorescence has been analyzed based on theoretical models such as direct energy transfer model (Inokuti-Hirayama) and migration assisted energy transfer models (Burshtein's hopping and Yokota-Tanimoto's diffusion). The corresponding energy transfer parameters have been evaluated and discussed. Primarily, electrostatic dipole-dipole (s approximately 6) interactions are found to be responsible for the occurrence of energy transfer process in theses glasses.
本文报道了掺钕-掺镱-掺铒新系列钡铝磷氧酸盐玻璃中能量传递机制的制备和系统分析。三重掺杂 Ba-Al-磷氧酸盐玻璃中 Nd(3+)的时间分辨荧光表明，Yb(3+)离子可以作为 Nd(3+)和 Er(3+)离子之间能量传递的有效桥梁。结果，在掺有 3mol% Yb(3+)的玻璃中，通过 806nm 激发 Nd(3+)的(4)F(5/2)能级，实现了 Er(3+)离子在 1.54um 处的四倍发射增强，能量传递效率高达 94%。基于直接能量转移模型（Inokuti-Hirayama）和迁移辅助能量转移模型（Burshtein 的跳跃和 Yokota-Tanimoto 的扩散），分析了供体（Nd(3+))离子荧光的衰减。评估和讨论了相应的能量传递参数。初步发现，静电偶极-偶极（s 约为 6）相互作用是这些玻璃中能量传递过程发生的原因。
