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Dy~(3+)在ZnO–SiO_2玻璃中的发光特性(英文)

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Abstract:

通过溶胶–凝胶法制备xZnO–(100–x)SiO2(x=0,5,10,20,摩尔分数)玻璃,研究ZnO含量对Dy3+发光强度的影响,并且研究Dy3+在紫外光和飞秒激光激发下的发光特性。结果表明当ZnO摩尔(下同)含量为0、5%和10%,Dy3+的发光强度几乎不变,当ZnO含量达到20%时,Dy3+的发光强度显著增强,归因于基质微结构的明显改变。研究了飞秒激光激发时,Dy3+在ZnO–SiO2玻璃中的上转换发光特性。在飞秒激光(800nm)激发下,观察到强Dy3+的上转换发光。Dy3+的发光强度与泵浦光强度的依赖关系表明上转换发光过程为双光子机制为主,根据Dy3+的能级,Dy3+在SiO2和ZnO–SiO2玻璃中的上转换发光的机制归因于激发态吸收。

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