On-Chip Topological Waveguides and Cavities

Topological photonics offers a powerful platform for next-generation nanophotonic chips, capitalizing on their remarkable resilience to disorder and defects. In this paper, we'll present a series of on-chip topological devices, including topological photonic cavity supporting lateral beam shifts, topological cavity confined at the topological corner states, terahertz (THz) valley-spin-valley converter, and THz taper-free topological waveguide.