Tailoring the optical properties of wide-bandgap based microcavities via metal films
Tailoring the optical properties of wide-bandgap based microcavities via metal films
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DOI：
10.1063/1.4928604
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发表时间：
2015-08-10
影响因子：
4
通讯作者：
Hommel, D.
中科院分区：
文献类型：
--
作者：
Sebald, K.;Rahman, S. K. S.;Hommel, D.
我们报告的调谐的光学性能的II-VI族材料为基础的微腔样品，这是通过沉积Ag膜上的结构。微反射率光谱显示了依赖于金属层厚度的样品共振的光谱偏移。通过将实验结果与应用传输矩阵法对金属-介质反射镜结构进行的理论计算进行比较，探讨了金属层特别是其部分氧化的影响。在具有三个ZnSe量子威尔斯的开放腔和顶部的金属层之间的界面处产生Tamm等离子体激元模式。当通过改变样品温度来调谐激子发射相对于模式时，观察到共振的反交叉。这是一个明确的指示，强耦合制度已实现在该样品配置产生拉比分裂为18.5meV。这些结果是有希望的实现极化激元为基础的光学器件与一个相当简单的样品配置。(C)2015 AIP Publishing LLC.
We report on the tuning of the optical properties of II-VI-material-based microcavity samples, which is achieved by depositing Ag films on top of the structures. The micro-reflectivity spectra show a spectral shift of the sample resonance dependent on the metal layer thickness. By comparison of the experimental findings with the theoretical calculations applying the transfer matrix method on a metal-dielectric mirror structure, the influence of the metal layer particularly with regard to its partial oxidation was explored. Tamm plasmon modes are created at the interface between an open cavity with three ZnSe quantum wells and a metal layer on top. When tuning the excitonic emission relative to the mode by changing the sample temperature, an anticrossing of the resonances was observed. This is a clear indication that the strong coupling regime has been achieved in that sample configuration yielding a Rabi splitting of 18.5meV. These results are promising for the realization of polariton-based optical devices with a rather simple sample configuration. (C) 2015 AIP Publishing LLC.