Extraordinary propagation characteristics of electromagnetic waves in one-dimensional anti-PT-symmetric ring optical waveguide network
Xu Jie-Feng, Yang Xiang-Bo †, Chen Hao-Han, Lin Zhan-Hong
       

Structural diagram of 1D APTSPROWN, including one entrance, three unit cells, and one exit. EI, EO, and ER are the input, output, and reflected EM waves, respectively.