Nonlinear Control of PT-symmetry and Topological States

• DOI: 10.1364/cleo_qels.2021.ftu2l.1
• Publication Date: 2021-08-17T18:41:09Z
• Authors: Shiqi Xia; Dimitrios Kaltsas; Daohong Song; Ioannis Komis; Jingjun Xu; Alexander Szameit; Hrvoje Buljan; Konstantinos G. M...; Zhigang Chen
• Keywords: Lattice (music); Zero (linguistics)

We demonstrate that optical nonlinearity can effectively modulate the loss of a topological defect waveguide in non-Hermitian photonic lattice, leading to switching between PT and non-PT-symmetric regimes control zero modes.