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NdP_5O_(14)晶体是一种高钕浓度的化学计量比的新型激光材料,它的特点是在高的Nd~(3+)浓度下荧光几乎不发生猝灭,因此,引起人们的广泛兴趣,并把它视为理想的微小型激光器的工作物质。自从1972年发现其激光性质后,对这种晶体的生长、光谱和结构特征进行了很多研究。本文主要计算晶场参数,以便更加深入地了解它的光学性质。已经知道,这种晶体属于单斜晶系,空间群为P2_1/c,Nd~(3+)离子的局部点对称性可近似取为C_(2v),Nd~(3+)离子在晶体中的能级也被光谱实验详细确定,这样,我们有条件进行晶场参数的计算。
NdP_5O_ (14) crystal is a new stoichiometric laser material with high neodymium concentration. Its characteristic is that the fluorescence is hardly quenched at a high Nd 3+ concentration and therefore has attracted widespread interest. Think of it as the working substance for an ideal tiny laser. Since the discovery of its laser properties in 1972, much has been done on the growth, spectral, and structural characteristics of this crystal. This article mainly calculates the crystal field parameters in order to get a deeper understanding of its optical properties. It is known that this crystal belongs to the monoclinic system with space group P2_1 / c. The local point symmetry of Nd ~ (3+) ions can be approximated as C 2v, Nd 3+ ions in the crystal The energy level is also determined by spectroscopy experiments, so that we have the conditions for the calculation of the crystal field parameters.