Abstract Topological photonic crystals. which offer topologically protected and back-scattering-immune transport channels. have recently gained significant attention for both scientific and practical reasons. Although most current studies focus on dielectric materials with weak dispersions. https://www.roneverhart.com/HGST-Ultrastar-7K6000-HUS726040ALS214-4TB-7-2K-RPM-SAS-12Gb-s-512n-128MB-3-5-SE-Hard-Drive/