Design and optimization of ellipsoid scatterer-based metasurfaces via the inverse T-matrix method
Design and optimization of ellipsoid scatterer-based metasurfaces via the inverse T-matrix method
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DOI：
10.1364/osac.376537
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发表时间：
2019-08
期刊：
影响因子：
1.6
通讯作者：
M. Zhelyeznyakov;A. Zhan;A. Majumdar
中科院分区：
文献类型：
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作者：
M. Zhelyeznyakov;A. Zhan;A. Majumdar
由离散波长尺度散射体组成的大面积超颖表面呈现出极大数量的自由度来设计光学元件。这些自由度提供了巨大的设计灵活性，并且超表面设计中的中心挑战是如何最佳地利用这些自由度来实现期望的光学功能。逆向设计可用于探索元表面的非直观设计空间。提出了一种利用椭球散射体的T矩阵散射进行超颖表面逆向设计的方法。使用这种方法设计了多功能偏振复用超颖表面。最后，我们应用这种方法来优化现有的高数值孔径（0.83）超透镜设计的效率，并报告效率从26%提高到32%
Large-area metasurfaces composed of discrete wavelength-scale scatterers present an extremely large number of degrees of freedom to engineer an optical element. These degrees of freedom provide tremendous design flexibility, and a central challenge in metasurface design is how to optimally leverage these degrees of freedom towards a desired optical function. Inverse design can be used to explore non-intuitive design space for metasurfaces. We report an inverse design method exploiting T-Matrix scattering of ellipsoidal scatterer based metasurfaces. Multifunctional, polarization multiplexed metasurfaces were designed using this approach. Finally, we apply this method to optimize the efficiency of an existing high numerical aperture (0.83)metalens design, and report an increase in efficiency from 26% to 32%