Metasurface Engineering through Bound States in the Continuum
Metasurface Engineering through Bound States in the Continuum
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DOI：
10.1103/physrevapplied.12.014024
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发表时间：
2019-07-12
影响因子：
4.6
通讯作者：
Tuz, Vladimir R.
中科院分区：
文献类型：
--
作者：
Kupriianov, Anton S.;Xu, Yi;Tuz, Vladimir R.
近年来，由于超颖表面提供了有效的波前控制和共振透射工程的替代方法，超颖表面引起了很多关注。我们讨论了一种方法，允许有效控制的外观与连续的束缚态的超颖表面的尖锐法诺共振。我们证明，通过打破横向对称性，在垂直于一个超颖表面的方向与复杂的晶胞，我们可以控制的数量，频率和类型的高Q共振起源于束缚态的连续。作为一个例子，我们实验证明了超颖表面的磁偶极子和环形偶极子响应的多极束缚态的物理支配。
Metasurfaces have attracted a lot of attention in recent years due to the alternative methods they provide for the efficient wavefront control and engineering of resonant transmission. We discuss an approach that allows the effective control of the appearance of sharp Fano resonances in metasurfaces associated with the bound states in the continuum. We demonstrate that by breaking the symmetry transversely, in the direction perpendicular to a metasurface with a complex unit cell, we can control the number, frequency, and type of high-Q resonances originating from bound states in the continuum. As an example, we demonstrate experimentally the metasurfaces with magnetic dipole and toroidal dipole responses governed by the physics of multipolar bound states.