论文标题
高质量因子光学元面的负耦合启用的旋转轨道相互作用
Spin-Orbit Interaction of Light Enabled by Negative Coupling in High Quality Factor Optical Metasurfaces
论文作者
论文摘要
我们研究了光子跨膜的局部共振，负耦合。在我们的分析中，我们发现了伪旋转轨道耦合的散装模式，导致二维动量空间中的圆形极化辐射本征态线，这些径向空间仅在三维中被认为存在。我们的理论模型是通过带有II型非弱点魔法点的引导共振介电元表示例的，从圆形极化线散发出来。设计的元表面在0和第一个衍射顺序中都带有圆形极化辐射特征状态，从而允许自旋选择光偏转。设计的跨表面的高质量因素性质和现场增强可能会导致旋转选择性传感，束控制和非线性光学元件的应用。我们的发现打开了一个网关，以设计近场耦合的辅助元面条。
We study the negative couplings amid local resonances of photonic metasurfaces. In our analysis, we discover pseudo-spin-orbit coupled bulk modes leading to lines of circularly polarized radiation eigenstates in two-dimensional momentum space which were considered to exist only in three-dimensions. Our theoretical model is exemplified via a guided resonance dielectric metasurface that possesses Type-II Non-Hermitian diabolical points, from where the circular polarization lines emanate. The designed metasurface carries circular polarized radiation eigenstates in both the 0th and the 1st diffraction orders, allowing spin-selective light deflections. The high quality factor nature and field enhancement of the designed metasurface could lead to applications for spin-selective sensing, beam control and nonlinear optics. Our findings open a gateway for the design of near-field couplings assisted metasurfaces.
