Observation of a dynamical mixing process of exciton-polaritons in a ZnSe epitaxial layer using four-wave mixing spectroscopy
Observation of a dynamical mixing process of exciton-polaritons in a ZnSe epitaxial layer using four-wave mixing spectroscopy
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使用四波混合光谱观察 ZnSe 外延层中激子极化子的动态混合过程
DOI：
10.1103/physrevb.86.235208
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发表时间：
2012
影响因子：
3.7
通讯作者：
and F. Minami
中科院分区：
文献类型：
--
作者：
H. Tahara;M. Bamba;Y. Ogawa;and F. Minami
我们通过光谱分辨四波混频光谱观测到了ZnSe外延层中激子-极化激元的相干光谱变化。的光谱表现出不同的极化激元分支之间的主峰位置的交换取决于第二脉冲的延迟时间。这一结果反映了多体相互作用下极化激元的初始产生过程。基于激子-光子微观模型的计算表明，光谱的变化是由于重空穴激子和轻空穴激子之间的四粒子关联引起的，清楚地显示了激子-极化激元在初始产生过程中的动力学混合过程.
We have observed a coherent spectral change of exciton-polaritons in a ZnSe epitaxial layer through spectrally resolved four-wave mixing spectroscopy. The spectra exhibit an exchange of the dominant peak position between the different polariton branches depending on the delay time of the second pulse. This result reflects the initial creation process of polaritons with many-body interactions. The calculation based on the exciton-photon microscopic model reveals that the spectral change occurs due to the four-particle correlations between heavy-hole and light-hole excitons; it clearly shows the dynamical mixing process of exciton-polaritons in the initial creation.