论文标题
双异性颗粒阵列中的可重构拓扑状态
Reconfigurable topological states in arrays of bianisotropic particles
论文作者
论文摘要
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来促进一种新型的弹性光操纵方法。各种前瞻性设备应用构成了灵活地控制与拓扑模式相关的鲁棒场定位的需求。在这里，我们设计了一个由空间对称性降低引起的谐振介电元原子的拓扑阵列。设计的元原子的相互取向编码交错的双异构模式，能够将拓扑状态捕获在包含少数颗粒的一维阵列中。我们表明，拓扑界面状态可以通过排列在等距晶格中的同轴双异性粒子的旋转来量身定制。我们基于陶瓷马蹄形磁盘的实验实现表明电磁拓扑状态的重新配置明显。
Topological photonics promotes a novel approach to resilient light manipulation by exploiting spatio-temporal symmetries of the system and dual symmetry of 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.
