论文标题
通过连贯的照明模仿双异性耦合
Emulating Bianisotropic Coupling Through Coherent Illumination
论文作者
论文摘要
相互性双异性跨度的主要优点之一是它们的能力是产生不对称散射的能力，具体取决于它们的照明以及圆形极化照明的手段。对于大多数应用，这些元信息一次是为一次源设计的。所得的双异性跨表面具有特定且通常是复杂的几何结构，可确保在各种照明下产生的预期散射。在这里，我们表明，在存在相干照明的情况下，可以使用非苯异端层来模拟跨境的几何不对称，从而使我们能够复制并光学地控制所需的不对称散射和chirality效应。特别是，该概念是在为平面波创建180美元$^\ circ $杂种连接所需的模拟不对称散射的示例中开发的。我们表明，可以使用双异性跨表面或一组带有两个相干波照明下的电动响应的简单床单来实现该设备。
One of the main advantages of reciprocal bianisotropic metasurfaces is their capability to produce asymmetric scattering depending from which side they are illuminated and on the handedness of circularly polarized illuminations. For most applications, these metasurfaces are designed for illumination by a single source at a time. The resulting bianisotropic metasurface has a specific and usually complex geometrical structure that ensures the expected scattering produced under various illuminations. Here we show that geometrical asymmetry of metasurfaces can be emulated by using non-bianisotropic layers in presence of coherent illumination, which allows us to replicate and optically control the desired asymmetric scattering and chirality effects. In particular, the concept is developed on an example of emulating asymmetric scattering needed to create a 180$^\circ$ hybrid junction for plane waves. We show that this device can be realized either using a bianisotropic metasurface or a set of simple sheets with electric response under simultaneous illumination by two coherent waves.
