论文标题
Fermi Arc重建合成光子晶格
Fermi arc reconstruction in synthetic photonic lattice
论文作者
论文摘要
Weyl半法的手性表面状态具有一个称为费米弧的开放式费米表面。在两个Weyl半法之间的界面上，这些费米弧被预测可以杂交和改变其连通性。在这封信中，我们通过数值研究了一维（1D）介电三层光栅，其中相邻层之间的相对位移起着两个合成动量的作用。晶格模仿没有时间反转对称性的3D晶体，包括Weyl Semimetal，Nodal Line Semimetal和Chern绝缘子。除了在电信波长处显示Weyl Semimetal和Chern绝缘子之间的相变外，该系统还使我们能够观察两个Weyl半学之间的费米电弧重建，从而确认理论预测。
The chiral surface states of Weyl semimetals have an open Fermi surface called Fermi arc. At the interface between two Weyl semimetals, these Fermi arcs are predicted to hybridize and alter their connectivity. In this letter, we numerically study a one-dimensional (1D) dielectric trilayer grating where the relative displacements between adjacent layers play the role of two synthetic momenta. The lattice emulates 3D crystals without time-reversal symmetry, including Weyl semimetal, nodal line semimetal, and Chern insulator. Besides showing the phase transition between Weyl semimetal and Chern insulator at telecom wavelength, this system allows us to observe the Fermi arc reconstruction between two Weyl semimetals, confirming the theoretical predictions.
