论文标题

相干逆转录元外面

Coherent Retroreflective Metasurfaces

论文作者

Cuesta, F. S., Ptitcyn, G. A., Mirmoosa, M. S., Tretyakov, S. A.

论文摘要

不均匀的跨膜表现出了对波传播和散射前所未有的控制的可能性。虽然通常是从这些元结构的一侧发出单个事件平面波,但两侧同时通过几个波照明可能会增强控制散射波的可能性,从而导致其他功能和新的应用。在这里,我们揭开了如何使用适当设计的不均匀跨表面纸的相干平面波照明,可以实现可控制的反射。我们将这些元信息称为“连贯的反向电流”,并解释了在理论和实践中实现它们的方法。我们表明,连贯的反向电流可用于滤波不希望的模式和波导中的场地定位区域的创建。后一种应用与辐射连续体中的结合状态相似。

Inhomogeneous metasurfaces have shown possibilities for unprecedented control of wave propagation and scattering. While it is conventional to shine a single incident plane wave from one side of these metastructures, illuminating by several waves simultaneously from both sides may enhance possibilities to control scattered waves, which results in additional functionalities and novel applications. Here, we unveil how using coherent plane-wave illumination of a properly designed inhomogeneous metasurface sheet it is possible to realize controllable retroreflection. We call these metasurfaces as "coherent retroreflectors" and explain the method for realizing them both in theory and practice. We show that coherent retroreflectors can be used for filtering undesired modes and creation of field-localization regions in waveguides. The latter application is in resemblance to bound states in the radiation continuum.

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