论文标题
光子dirac节点线半金属通过超晶体实现
Photonic Dirac Nodal Line Semimetals Realized by Hyper-crystal
论文作者
论文摘要
最近，具有线性分散和受拓扑保护模式的无间隙狄拉克/Weyl节点半法是拓扑物理学的迅速增长。尤其是，I型，II型和关键的III型淋巴结半学是根据Dirac/Weyl锥的倾斜角度发现的。在这里，通过将双曲线超材料引入一维光子晶体中，我们设计了“超晶体”，并研究了具有两种垂直极性波的光子四倍的dementer dementore Dirac Nodal Line半法（DNLS）。此外，还研究了使用双曲线色散的相位补偿效应的灵活控制的光子DNLS。我们的结果不仅展示了一个新的平台来实现各种光子DNLS，其中光学极化在电子DNLS中起着电子自旋的作用，而且还可以铺平一种新颖的方式来探索简单古典波系统中丰富的Dirac/Weyl物理学。
Recently, the gapless Dirac/Weyl nodal semimetals with linear dispersion and topologically protected modes degeneracy are rapidly growing frontiers of topological physics. Especially, type-I, type-II, and critical type-III nodal semimetals are discovered according to the tilt angles of the Dirac/Weyl cones. Here, by introducing hyperbolic metamaterials into one-dimensional photonic crystals, we design the "hyper-crystal" and study the photonic four-fold degenerate Dirac nodal line semimetals (DNLSs) with two types of perpendicularly polarized waves. Moreover, the flexibly controlled photonic DNLSs using the phase compensation effect of hyperbolic dispersion are studied. Our results not only demonstrate a new platform to realize the various photonic DNLSs, where the optical polarization plays the role of electron spin in electronic DNLSs, but also may pave a novel way to explore the abundant Dirac/Weyl physics in the simple classical wave systems.
