Sun Liaoxin, Dong Hongxing, Xie Wei, Lu Jian, Chen Zhanghai, Shen Xuechu, Lu Wei
Opt Express. 2013 Dec 16;21(25):30227-32. doi: 10.1364/OE.21.030227.
We report the cathodoluminescence (CL) study of bound-exciton-polaritons in ZnO whispering gallery (WG) microcavity. Thanks to the very high spatial resolution (: 100 nm) of CL technique, a scanning CL mapping along the tapered ZnO nanowire is achieved. We observe a clear anticrossing behavior which demonstrates the strong coupling between cavity mode and bound-excitons. Coupled oscillator model including both bound excitons and free excitons fits well with the experimental results. The energy splitting of bound-exciton-polaritons:2.6 meV is obtained.
我们报告了对ZnO回音壁（WG）微腔中束缚激子极化激元的阴极发光（CL）研究。由于CL技术具有非常高的空间分辨率（：100 nm），因此实现了沿锥形ZnO纳米线的扫描CL映射。我们观察到明显的反交叉行为，这证明了腔模与束缚激子之间的强耦合。包含束缚激子和自由激子的耦合振荡器模型与实验结果拟合良好。获得了束缚激子极化激元的能量分裂：2.6 meV。
