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UV assisted local crystallization in Er3+ doped oxy-fluoride glass

机译:紫外线辅助Er3 +掺杂氟氧化物玻璃中的局部结晶

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摘要

We report on fabrication of Er3+-activated LaF3 nanocrystals in transparent glasses using an original technique, which combines both heat treatment, below glass crystallization temperature, and ultraviolet laser irradiation at 244 nm. The main advantage of this method is to control the spatial localization of the nanoparticles in the glass sample, whereas annealing solely at the crystallization temperature leads to a fully crystallized glass sample. Thermal differential analysis was used to determine the crystallization temperature of the sample. The photoluminescence spectra behaviour of Er3+ ions, collected from the UV-irradiated and unirradiated regions, allowed us to follow and to distinguish the structural changes in the glass network under heat treatment and ultraviolet exposure. (c) 2007 Elsevier B.V. All rights reserved.
机译:我们报告使用原始技术在透明玻璃中制备Er3 +活化的LaF3纳米晶体,该技术结合了低于玻璃结晶温度的热处理和244 nm的紫外线照射。该方法的主要优点是控制了玻璃样品中纳米颗粒的空间定位,而仅在结晶温度下退火会导致玻璃样品完全结晶。使用热差分析来确定样品的结晶温度。从紫外线照射和未照射区域收集的Er3 +离子的光致发光光谱行为,使我们能够追踪并区分热处理和紫外线照射下玻璃网络的结构变化。 (c)2007 Elsevier B.V.保留所有权利。

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