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physics.optics2023★ 2 cited
Eigenenergy braids in 2D photonic crystals
Janet Zhong, Charles C. Wojcik, Dali Cheng +1
We consider non-Hermitian energy band theory in two-dimensional systems, and study eigenenergy braids on slices in the two-dimensional Brillouin zone. We show the consequences of r…
physics.optics2021★ 57 cited
Eigenvalue topology of non-Hermitian band structures in two and three dimensions
Charles C. Wojcik, Kai Wang, Avik Dutt +2
In the band theory for non-Hermitian systems, the energy eigenvalues, which are complex, can exhibit non-trivial topology which is not present in Hermitian systems. In one dimensio…