Fig. 1. Photonic mass term distribution and representative band structure of unit cells in TM modes

Fig. 2. Photonic mass term distribution and representative band structure of unit cells in TE modes

Fig. 3. Schematic of super cells and band structure in TM modes

Fig. 4. Schematic of super cells and band structure in TE modes

Fig. 5. Transportation property of topological edge states in "Z"-shaped photonic crystal metasurface

Fig. 6. Property of localized modes in topological photonic crystal micro-cavity

Fig. 7. Realization of topological logic gates and optical switch