Session I

[31-I-03] Topological invariant of non-Hermitian photonic bands undergoing band inversion

Paul Bouteyre¹, Ferrier Lydie¹, Xuan Dung Nguyen^2,3, Xavier Letartre¹, Ségolène Callard¹, Taha Benyattou¹, Pierre Viktorovitch¹, *Hai Son Nguyen^1,4 (1. Univ Lyon, Ecole Centrale de Lyon, INSA Lyon, INL, France, 2. Brown University, USA, 3. Institute for Basic Science (IBS), Korea, 4. Institut Universitaire de France (IUF), France)