Double-bowl state in photonic Dirac nodal line semimetal
作者机构：National Laboratory of Solid State MicrostructuresSchool of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing University210093NanjingChina Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological UniversitySingapore637371Singapore Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and TechnologyWuhan University430072WuhanChina
出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)
年 卷 期：2021年第10卷第9期
页 面：1761-1767页
核心收录：
学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0701[理学-数学] 0702[理学-物理学] 070101[理学-基础数学]
基 金：This work is supported by National Natural Science Foundation of China(Grant No.11904264,11690033) National Key Research and Development Program of China(No.2017YFA0205700) National Key R&D Program of China(2017YFA0303702) M.X.is supported by the startup funding of Wuhan University
主 题：nodal Dirac degenerate
摘 要：The past decade has seen a proliferation of topological materials for both insulators and semimetals in electronic systems and classical *** semimetals exhibit topologically protected band degeneracies,such as nodal points and nodal *** nodal line semimetals(DNLS),which own four-fold line degeneracy,have drawn particular *** have been studied in electronic systems but there is no photonic *** in this work,we provide a new mechanism,which is unique for photonic systems to investigate a stringent photonic *** truncated,the photonic DNLS exhibits double-bowl states(DBS),which comprise two sets of perpendicularly polarized surface *** sharp contrast to nondegenerate surface states in other photonic systems,here the two sets of surface states are almost degenerate over the whole-spectrum *** DBS and the bulk Dirac nodal ring(DNR)dispersion along the relevant directions,are experimentally resolved.
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