College of Physics;
Taiyuan University of Technology;
Taiyuan 030024;
China;
Key Laboratory of Advanced Transducers and Intelligent Control System;
Ministry of Education;
Taiyuan University of Technology;
Taiyuan 030024;
China;
School of Science;
RMIT University;
Melbourne;
Victoria 3000;
Australia;
topological photonics; topological edge state; valley photonic crystal; all-optical logic gate;