Reconfigurable Topological States in Arrays of Bianisotropic Particles,ACS Photonics

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Reconfigurable Topological States in Arrays of Bianisotropic Particles
ACS Photonics ( IF 6.5 ) Pub Date : 2022-06-09 , DOI: 10.1021/acsphotonics.2c00309
Zuxian He ₁ , Daniel A. Bobylev ₂ , Daria A. Smirnova _{3,

4} , Dmitry V. Zhirihin ₂ , Maxim A. Gorlach ₂ , Vladimir R. Tuz ₁

Affiliation

Topological photonics promotes an efficient approach to resilient light manipulation by exploiting spatiotemporal symmetries of the system and dual symmetry of the electromagnetic field. Various prospective device applications pose the need to flexibly control robust field localization associated with topological modes. Here we design a topological array of resonant dielectric meta-atoms with bianisotropic response induced by a spatial symmetry reduction. Mutual orientation of the designed meta-atoms encodes a staggered bianisotropy pattern capable of trapping topological states in a one-dimensional array containing a small number of particles. We show that the topological interface state can be tailored by the rotation of coaxial bianisotropic particles arranged in an equidistant lattice. Our experimental implementation based on ceramic horseshoe-shaped disks demonstrates remarkable reconfigurability of electromagnetic topological states.

中文翻译：

双各向异性粒子阵列中的可重构拓扑状态

拓扑光子学通过利用系统的时空对称性和电磁场的双重对称性，促进了一种有效的弹性光操纵方法。各种预期的设备应用需要灵活控制与拓扑模式相关的鲁棒场定位。在这里，我们设计了一个共振介电元原子的拓扑阵列，具有由空间对称性降低引起的双各向异性响应。设计的元原子的相互取向编码了一种交错的双各向异性模式，能够将拓扑状态捕获在包含少量粒子的一维阵列中。我们表明，拓扑界面态可以通过排列在等距晶格中的同轴双各向异性粒子的旋转来定制。

更新日期：2022-06-09

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