Photoreflectance Spectroscopy of Excitons in β-ZnP 2
Photoreflectance Spectroscopy of Excitons in β-ZnP 2
复制标题
β-ZnP 2 中激子的光反射光谱
DOI：
10.1080/1058726021000044569
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
K. Nakanishi
中科院分区：
文献类型：
--
作者：
O. Arimoto;K. Nakanishi
为了研究g-ZnP 2单重态激子的精细结构，对g-ZnP 2单重态激子系统进行了光反射光谱研究。PR谱在每个激子能级处显示出清晰的结构，具有较大的调制幅度。结果表明，PR信号产生的机制是电反射，由于光激发载流子的周期性消除内置的表面电场。通过使用钛：蓝宝石激光器作为探测光获得的高分辨率PR光谱揭示了高达n =6的单重态激子的较高成员。
Photoreflectance (PR) spectroscopy has been performed for the singlet exciton system of g -ZnP 2 in order to investigate fine structure of the higher exciton states. The PR spectrum shows clear structure at each exciton level with large modulation amplitude. It is shown that the mechanism by which the PR signal is produced is electroreflectance due to the periodic cancellation of the built-in surface electric field by photoexcited carriers. A high-resolution PR spectrum obtained by using a Ti:sapphire laser as a probe light reveals the higher members of singlet excitons up to n =6.