Polariton MultiMode Interferometer Controlled by Optical Stark Shift in WS2 Microcavity
Polariton MultiMode Interferometer Controlled by Optical Stark Shift in WS2 Microcavity
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DOI：
10.1109/jqe.2020.2968138
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发表时间：
2020-01
影响因子：
2.5
通讯作者：
Mahnoor Shahzadi;C. Zheng;S. Wang;Wei Li Zhang
中科院分区：
文献类型：
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作者：
Mahnoor Shahzadi;C. Zheng;S. Wang;Wei Li Zhang
基于微腔中激子极化激元的应用为实现光电子和量子信息领域的低能耗和超快器件提供了新的途径。在这里，我们提出了一种方法来设计偏振激元多模干涉仪在WS2微腔的全光控制方法。极化激元的干涉现象是由著名的光学斯塔克效应控制的。光学斯塔克光改变色散（例如，有效折射率），并在其中产生波导区，从而支持极化激元的不同导模。然后通过改变斯塔克光的光束图案或强度来引导极化激元的多模干涉。通过对平面波导的有效折射率计算和本征模分析，对该方法进行了理论分析和证明。
Applications based on the formation of exciton polariton in microcavities provide new avenues for the realization of low-energy consumption and ultrafast devices in areas of photo-electronic and quantum information. Here, we propose a way to design polaritonic multi-mode interferometers in a WS2 microcavity by an all optical control method. The interference phenomenon of polariton is controlled by the well-known optical Stark effect. The optical Stark light changes dispersion (e.g., effective refractive index) of the illuminated region, and generates a waveguide region therein, thus supporting different guided modes of polariton. Multi-mode interference of polariton is then guided by changing the beam pattern or intensity of the Stark light. This proposed method is then theoretically analyzed and proved via effective refractive index calculation and eigenmode analysis of plane waveguide.