Magneto-optical studies of the Z 1,2 exciton-polaritons in CuI: Effects of finite exciton wave vector
Magneto-optical studies of the Z 1,2 exciton-polaritons in CuI: Effects of finite exciton wave vector
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CuI 中 Z 1,2 激子极化子的磁光研究：有限激子波矢量的影响
DOI：
10.1103/physrevb.22.4931
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发表时间：
1980
影响因子：
3.7
通讯作者：
T. Sauder
中科院分区：
文献类型：
--
作者：
S. Suga;K. Cho;Y. Niji;J. Merle;T. Sauder
与 CuI 中的 Z 1, 2 (γ 8× γ 6) 激子态相关的偏振分辨磁反射光谱可在高达 12 T 的温度下测量。源自 (γ 4, γ 3) 激子态的反射率异常的出现和各向异性塞曼分裂可以通过闪锌矿晶体中 Z 1, 2 激子的“k 线性项效应”来解释。根据最近处理多分量极化子引起的反射线形状的理论，对测量结果进行定量分析，提供激子参数的值，例如κ ̃、g ̃ c、γ 2 ex、ℏ K l 和交换相互作用。在该模型中很好地理解了在 Z 1, 2 激子区域测量的磁致发光光谱及其不寻常的温度变化，该模型解释了 (Г 4, Г 3) 激子极化子对通常可观察到的 Г 5 下极化子和上极化子发光带的贡献。
Polarization-resolved magnetoreflectance spectra associated with the Z 1, 2 (Γ 8× Γ 6) exciton states in CuI are measured up to 12 T. The appearance and the anisotropic Zeeman splitting of the reflectance anomaly originating from the (Γ 4, Γ 3) exciton states are interpreted by means of the" k-linear term effect" on the Z 1, 2 excitons in zinc-blende crystals. According to a recent theory which treats the reflectance line shape due to multicomponent polaritons, the measured results are quantitatively analyzed, providing the values of exciton parameters such as κ ̃, g ̃ c, γ 2 ex, ℏ K l, and exchange interactions. Magnetoluminescence spectra measured in the Z 1, 2 excitons region and their unusual temperature change are well understood in this model which explains the contributions of the (Γ 4, Γ 3) exciton polaritons to the normally observable Γ 5 lower and upper polariton luminescence bands.