Bifurcated overtones of one-way localized Fabry–Pérot resonances in parity-time symmetric optical lattices

Gaafer Fatma Nafaa¹, Shen Yaxi¹, Peng Yugui¹, Wu Aimin^{2, †}, Zhang Peng^{3, ‡}, Zhu Xuefeng^{1, 2, 4, §}

(color online) Calculations of (a) , (b) , (c) , and (d) . Here the solid blue lines and dashed red lines show the real part and imaginary part, respectively. The black dots mark the positions at which and .