Topological photonics: From crystals to particles

作     者：Gleb Siroki Paloma A. Huidobro Vincenzo Giannini 

作者机构：Department of Physics Imperial College London London SW7 2AZ United Kingdom Instituto de Estructura de la Materia IEM-CSIC E-28006 Madrid Spain 

出 版 物：《Physical Review B》 (Phys. Rev. B)

年 卷 期：2017年第96卷第4期

页      面：041408(R)-041408(R)页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Horizon 2020 Framework Programme, H2020, (700745) Engineering and Physical Sciences Research Council, EPSRC, (EP/L015579/1, EP/J021199/1) 

主　　题：Edge states Photonics Topological phases of matter Nanoparticles Finite-difference time-domain method 

摘      要：Photonic crystal topological insulators host protected states at their edges. In the band structure these edge states appear as continuous bands crossing the photonic band gap. They allow light to propagate unidirectionally and without scattering. In practice it is essential to make devices relying on these effects as miniature as possible. Here we study photonic topological insulator particles (finite crystals). In such particles the edge state frequencies are discrete. Nevertheless, the discrete states support pseudospin-dependent unidirectional propagation. They allow light to bend around sharp corners similarly to the continuous edge states and act as topologically protected whispering gallery modes, which can store and filter light as well as manipulate its angular momentum. Though we consider a particular all-dielectric realization that does not require a magnetic field, the results in the findings are general, explaining multiple experimental observations of discrete transmission peaks in photonic topological insulators.