Time-resolved magneto-optical experiments in Cd1−xMnxTe/ZnTe multiple quantum wells
Time-resolved magneto-optical experiments in Cd1−xMnxTe/ZnTe multiple quantum wells
复制标题
Cd1−xMnxTe/ZnTe 多量子阱中的时间分辨磁光实验
DOI：
10.1063/1.369997
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发表时间：
1999
影响因子：
3.2
通讯作者：
Y. Oka
中科院分区：
文献类型：
--
作者：
R. Pittini;H. Mitsu;M. Takahashi;Jinxi Shen;Y. Oka
在Cd 0. 9 Mn 0. 1 Te/ZnTe多量子阱威尔斯中进行了光抽运-探测实验，研究了该材料中激子磁极化子的动力学.观察到两次相反体征的一过性惊厥。第一个信号是负的，并且表示随着激子接近饱和，光吸收降低。第二个信号是正的，并且被解释为在由泵浦脉冲产生的初始激子已经衰减留下磁极化Mn环境之后吸收“新激子”。Mn离子的自旋弛豫时间为601 ps。最后，我们讨论了极化子-极化子相互作用的影响，这与我们的实验有关，因为我们使量子威尔斯阱中的激子饱和。
Optical pump-probe experiments were performed in Cd0.9Mn0.1Te/ZnTe multiple quantum wells to study the dynamics of the exciton magnetic polaron in this material. Two transient absorptions of opposite sign were observed. The first signal is negative and indicates the decrease of optical absorption, as the excitons are approaching saturation. The second signal is positive and is interpreted as the absorption of “new excitons” after the initial excitons created by the pump pulse have decayed leaving behind a magnetic polarized Mn environment. The spin relaxation time of the Mn ions has been determined to be 601 ps. Finally, we discuss the effect of the polaron–polaron interaction, relevant in our experiment because we saturate the excitons in the quantum wells.