Figure 2From: Topological zero-dimensional photonic modes in chiral coupled-cavity arrays Frequency band structure for \(\pmb{\phi = \pi /2}\) , \(\pmb{l=0.3a}\) of the chain of Figure 1 where the cavities are embedded in a chiral ( \(\pmb{\eta = 0.5}\) - solid lines) and non-chiral ( \(\pmb{\eta=0}\) - dashed lines) host medium. The thick straight line at \(\Omega=0\) corresponds to the manifold of degenerate zero-dimensional modes.Back to article page