Long-range-interacting topological photonic lattices breaking channel-bandwidth limit  

作　　者：Gyunghun Kim Joseph Suh Dayeong Lee Namkyoo Park Sunkyu Yu 

机构地区：[1]Department of Electrical and Computer Engineering,Intelligent Wave Systems Laboratory,Seoul National University,Seoul 08826,Korea [2]Department of Electrical and Computer Engineering,Photonic Systems Laboratory,Seoul National University,Seoul 08826,Korea

出　　处：《Light(Science & Applications)》2024年第10期2367-2375,共9页光（科学与应用)（英文版）

基　　金：support from the National Research Foundation of Korea(NRF)through the Basic Research Laboratory(No.RS-2024-00397664);Young Researcher Program(No.2021R1C1C1005031);Mid-career Researcher Program(No.RS-2023-00274348);all funded by the Korean government;supported by Creative-Pioneering Researchers Program and the BK21 FOUR program of the Education and Research Program for Future ICT Pioneers in 2023,through Seoul National University.We also acknowledge an administrative support from SOFT foundry institute.

摘　　要：The presence of long-range interactions is crucial in distinguishing between abstract complex networks and wave systems.In photonics,because electromagnetic interactions between optical elements generally decay rapidly with spatial distance,most wave phenomena are modeled with neighboring interactions,which account for only a small part of conceptually possible networks.Here,we explore the impact of substantial long-range interactions in topological photonics.We demonstrate that a crystalline structure,characterized by long-range interactions in the absence of neighboring ones,can be interpreted as an overlapped lattice.This overlap model facilitates the realization of higher values of topological invariants while maintaining bandgap width in photonic topological insulators.This breaking of topology-bandgap tradeoff enables topologically protected multichannel signal processing with broad bandwidths.Under practically accessible system parameters,the result paves the way to the extension of topological physics to network science.

关 键 词：TOPOLOGICAL BREAKING neighboring 

分 类 号：O43[机械工程—光学工程] TN2[理学—光学]