Bragg polaritons in a ZnSe-based unfolded microcavity at elevated temperatures
Bragg polaritons in a ZnSe-based unfolded microcavity at elevated temperatures
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DOI：
10.1063/1.4944717
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发表时间：
2016-03
影响因子：
4
通讯作者：
K. Sebald;S. Rahman;M. Cornelius;T. Kaya;J. Gutowski;T. Klein;A. Gust;D. Hommel;S. Klembt
中科院分区：
文献类型：
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作者：
K. Sebald;S. Rahman;M. Cornelius;T. Kaya;J. Gutowski;T. Klein;A. Gust;D. Hommel;S. Klembt
在这篇文章中，我们提出了ZnSe量子阱激子与布拉格模式的强耦合，导致布拉格极化子本征态的形成，其特征是与传统微腔相比有效质量小。我们观察到我们的样品中的激子和光子成分的反交叉是强耦合制度的明确标志。通过改变激子组分和布拉格模之间的失谐来研究防交叉。我们发现第一布拉格模和重空穴以及光空穴激子之间的反交叉分别导致了三个极化子分支。观测到的布拉格极化子分支与理论计算相吻合。强耦合存在的强烈迹象可追溯到200 K的温度，具有重空穴和轻空穴激子的Bragg模式的拉比分裂能量分别为24 meV和13 meV。这些发现证明了这个示例配置的优点。
In this contribution, we present strong coupling of ZnSe quantum well excitons to Bragg modes resulting in the formation of Bragg polariton eigenstates, characterized by a small effective mass in comparison to a conventional microcavity. We observe an anticrossing of the excitonic and the photonic component in our sample being a clear signature for the strong-coupling regime. The anticrossing is investigated by changing the detuning between the excitonic components and the Bragg mode. We find anticrossings between the first Bragg mode and the heavy- as well as light-hole exciton, respectively, resulting in three polariton branches. The observed Bragg-polariton branches are in good agreement with theoretical calculations. The strong indication for the existence of strong coupling is traceable up to a temperature of 200 K, with a Rabi-splitting energy of 24 meV and 13 meV for the Bragg mode with the heavy- and light-hole exciton, respectively. These findings demonstrate the advantages of this sample configu...