Equal Power Splitting in a Rotationally Symmetric Valley Photonic Junction

Topological valley photonic crystal based waveguides have shown to provide scattering resistance from lattice defects and sharp bends while maintaining a small footprint in photonics. In this work we present our latest efforts in designing a rotationally symmetric 6-port junction utilising topological valley mode waveguides that exhibits equal power spitting when excited at one port to ports 2,4 and 6. To do this, a scattering matrix is carefully extracted to analytically represent the structure, showing its potential in the design of topological structures for elementary computing processes.