Comparative study of Hermitian and non-Hermitian topological dielectric photonic crystals
Menglin L. N. Chen,
Li Jun Jiang,
Shuang Zhang
et al.
Abstract:The effects of gain and loss on the band structures of a bulk topological dielectric photonic crystal (PC) with C6v symmetry and the PC-air-PC interface are studied based on first-principle calculation. To illustrate the importance of parity-time (PT) symmetry, three systems are considered, namely the PT-symmetric, PT-asymmetric, and lossy systems. We find that the system with gain and loss distributed in a PT symmetric manner exhibits a phase transition from a PT exact phase to a PT broken phase as the streng… Show more
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