Guochao Wei

May 3, 2024 | link.aps.org | Guochao Wei |Wuhan Textile |Beibei Wang |Kang Du

Non-Hermitian systems offer novel methods for manipulating electromagnetic waves, including applications in sensing and mode conversion, attracting significant research interest. In this work, we propose a hybrid photonic crystal comprised of two topologically distinct heterostructures with angle-insensitive band gaps. This hybrid photonic crystal can sustain two topological interface states (TISs), and is considered as an optical non-Hermitian system.