Vector valley Hall edge solitons in the photonic lattice with type-Ⅱ Dirac cones

作     者：Yiqing Tian Yiqi Zhang Yongdong Li Milivoj RBelić Yiqing Tian;Yiqi Zhang;Yongdong Li;Milivoj R.Beli?

作者机构：Key Laboratory for Physical Electronics and Devices of the Ministry of Education&Shaanxi Key Lab of Information Photonic TechniqueSchool of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049China Science ProgramTexas A&M University at QatarP.O.Box 23874 DohaQatar 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2022年第17卷第5期

页      面：75-82页

核心收录：

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.12074308 and U1537210) the Fundamental Research Funds for the Central Universit(No.xzy012019038) Work in Qatar is supported by the NPRP-11S-1126-170033 project from the Qatar National Research Fund(a member of the Qatar Foundation) 

主　　题：valley Hall effect topological edge soliton photonic topological insulator 

摘      要：Topological edge solitons represent a significant research topic in the nonlinear topological *** maintain their profiles during propagation,due to the joint action of lattice potential and nonlinearity,and at the same time are immune to defects or disorders,thanks to the topological *** the past few years topological edge solitons were reported in systems composed of helical waveguide arrays,in which the time-reversal symmetry is effectively *** recently,topological valley Hall edge solitons have been demonstrated in straight waveguide arrays with the time-reversal symmetry ***,these were scalar solitary ***,for the first time,we report vector valley Hall edge solitons in straight waveguide arrays arranged according to the photonic lattice with innate type-II Dirac cones,which is different from the traditional photonic lattices with type-I Dirac cones such as honeycomb *** comes about because the valley Hall edge state can possess both negative and positive dispersions,which allows the mixing of two different edge states into a vector *** results not only provide a novel avenue for manipulating topological edge states in the nonlinear regime,but also enlighten relevant research based on the lattices with type-II Dirac cones.