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physics.optics2019
Realization of complex conjugate media using non-PT-symmetric photonic crystals
Xiaohan Cui, Kun Ding, Jianwen Dong +1
While parity-time (PT)-symmetric systems can exhibit real spectra in the exact PT-symmetry regime, the PT-symmetry is actually not a necessary condition for the real spectra. Here…
physics.optics2019
Machine prediction of topological transitions in photonic crystals
Bei Wu, Kun Ding, C. T. Chan +1
We train artificial neural networks to distinguish the geometric phases of a set of bands in 1D photonic crystals. We find that the trained network yields remarkably accurate predi…
physics.optics2018
Dynamically encircling an exceptional point in anti-PT-symmetric systems: asymmetric mode switching for symmetry-broken states
Xu-Lin Zhang, Tianshu Jiang, Hong-Bo Sun +1
Dynamically encircling an exceptional point (EP) in parity-time (PT) symmetric systems shows an interesting chiral dynamics, leading to asymmetric mode switching in which the outpu…