论文标题
旋转偶极子辐射的垂直路由从手性元膜辐射
Vertical routing of spinning dipoles radiation from a chiral metamembrane
论文作者
论文摘要
我们提出了一个理想的光子路由器，基于专门设计的手性Bi-metasurface膜，用于自旋光点光源。由于镜像在手性元膜中破裂，因此顺时针和逆时针旋转偶极子向相对的侧面的辐射功率通量变得不同。我们表明，在专门设计的手性D $ _4 $ - 符合双质膜膜的旋转偶极子可以根据其旋转方向向上或向下发射光。我们将这一现象归因于Fano-resonance效应，这是导致模式与FAR场耦合的结果。我们展示了达到100 \％路由效率的D $ _4 $ - 符合结构的优势。这种现象可以在自旋选择性片间耦合或作为记忆细胞中自旋极化的测量工具中找到用于自旋选择性片间耦合的应用。
We propose a perfect photonic router based on a specially designed chiral bi-metasurface membrane for spin-polarized point light sources. Due to the mirror symmetry breaking in the chiral metamembrane, the radiation power flux of the clockwise and counterclockwise spinning dipoles to the opposite sides of the slab becomes different. We show that spinning dipoles in the specially designed chiral D$_4$-symmetrical bi-metasurface membrane can emit light either upwards or downwards depending on their rotation direction. We attribute this phenomenon to the Fano-resonance effect which is a result of the guided modes coupling with the far field. We show the advantage of D$_4$-symmetrical structures for the achievement of 100\% routing efficiency. This phenomenon can find applications in spintronics for spin-selective inter-chip coupling or as a measurement tool of spin polarization in memory cells.
