Topological Edge Modes in One-dimensional Photonic Artificial Structures (Invited)

In recent years, topological states in photonic artificial structures have attracted great attention due to their robustness against certain disorders and perturbations.To readily understand the underlying principles, topological edge modes in one-dimensional (1D) system have been widely investigated, which bring about the discovery of novel optical phenomena and devices.In this article, we review our recent advances in topological edge modes.We introduce the connection between topological orders and effective electromagnetic parameters of photonic artificial structures in band gaps, discuss experimental demonstration of robust topological modes and their potential applications in wireless power transfer, sensing and field of optics, and give a brief introduction of future opportunities in 1D topological photonics.