Non-Abelian topological insulators have been realized on transmission lines and acoustic systems, whereas their implementation at optical frequencies remains elusive. Here, the authors propose a minimal model for non-Abelian topological insulators and experimentally demonstrate a six-band system in a photonic waveguide array, at around 800 nm.
- Tianshu Jiang
- Zhen-Nan Tian
- Xu-Lin Zhang