Zn0.83Mn0.17Se和ZnSe/Zn0.84Mn0.16Se超晶格材料中Mn2+的压力光谱研究

 采用压力光谱技术在低温下观测到了Mn²⁺离子的⁴T₁→⁶A₁跃迁，该谱线在Zn_0.83Mn_0.17Se和ZnSe/Zn_0.84Mn_0.16Se超晶格样品中有不同的压力行为，体材料中其压力系数为-42.4 peV/Pa，超晶格中为-29.5 peV/Pa。用晶体场理论计算得到体材料Zn_0.83Mn_0.17Se中Mn²⁺离子⁴T₁→⁶A₁谱线的压力系数为-38.3 peV/Pa，与实验结果基本一致。结合材料中发光峰积分强度随压力的变化关系进行分析，证实Mn²⁺离子的发光性质主要与其近邻的晶体场环境有关。

Study on Photoluminescence of Mn~(2+) in Zn_(0.83)Mn_(0.17)Se and ZnSe/Zn_(0.84)Mn_(0.16)Se Superlattics under Pressures

The photoluminescence of Mn²⁺ in Zn_0.83Mn_0.17Se and ZnSe/Zn_0.84Mn_0.16Se superlattics was investigated at different pressures. The ⁴T₁→⁶A₁ transition of Mn²⁺, which shows different pressure dependence in bulk materials and superlattics, was observed. The pressure coefficients obtained from them are -42.4 and -29.5 peV/Pa, respectively. The theoretical calculation for pressure coefficient of the emissions in Zn_0.83Mn_0.17Se gave the result -38.3 peV/Pa, which is almost consistent with experiment. Further analysis of pressure dependence for emission intensity confirms that the emission characteristic of Mn²⁺ was mainly affected by near crystal field. Their different properties mainly root in different band structures and strains in ZnSe/Zn_0.84Mn_0.16Se superlattics.