Analytical study of mode degeneracy in non-Hermitian photonic crystals with TM-like polarization

Xuefan Yin, Yong Liang, Liangfu Ni +3

We present an analytical study of the mode degeneracy in non-Hermitian photonic crystals (PC) with $C_{4v}$ symmetry, from the perspective of the coupled-wave-theory (CWT). The wav…