Mengjia He

TL;DR: In this article, a 3D photonic topological insulator with an extremely wide (more than 25 per cent bandwidth) 3D topological bandgap is presented, made of split-ring resonators with strong magneto-electric coupling.

TL;DR: In this paper, a 3D photonic TIs with an extremely wide (> 25% bandwidth) 3D topological bandgap is presented. But the 3D TIs do not behave as a 2D spin Hall insulator.

TL;DR: In this paper, a dual-band valley-Hall topological insulator (VH-PTI) was demonstrated in a microwave substrate-integrated circuitry, where the topological kink states exist at two separated frequency bands, and the simulated and experimental results demonstrate that the dualband PTI is robust against sharp bends of the internal domain wall with negligible inter-valley scattering.

TL;DR: In this article, the authors experimentally demonstrate and manipulate valley kink states at generic interfaces in subwavelength substrate-integrated photonic circuitry, and verify the robustness of the valley pseudo-spins through twisted interfaces and interfaces with disorders, and realize several topological channel intersections where photonic transport paths are related to geometries of the intersections.

TL;DR: In this article, the authors experimentally demonstrate and manipulate valley kink states at generic interfaces in subwavelength substrate-integrated photonic circuitry, and verify the robustness of the valley pseudo-spins through twisted interfaces and interfaces with disorders, and realize several topological channel intersections where photonic transport paths are related to geometries of the intersections.