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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★ 8 cited
Universal behavior of the scattering matrix near thresholds in photonics
Charles C. Wojcik, Haiwen Wang, Meir Orenstein +1
Scattering thresholds and their associated spectral square root branch points are ubiquitous in photonics. In this Letter, we show that the scattering matrix has a simple universal…