Fig. 1. Schematic of the generalized trimerized non-Hermitian lattice.扩展的三聚化非厄密晶格示意图

Fig. 2. The eigen-energy spectrum of the trimerized non-Hermitian lattice. (a), (c), (e) and (g) show the real parts of the energy spectrum for , respectively; (b), (d), (f) and (h) show the imaginary parts of the energy spectrum for . Green solid lines and brown dash lines represent the energy band of the edge states. 三聚化非厄密晶格的本征能谱　(a), (c), (e)和(g)分别为 时本征能谱的实部; (b), (d), (f)和(h)分别为 时本征能谱的虚部, 边缘态能带用绿色实线和棕色虚线表示

Fig. 3. Photon distributions for eigenstates of the system: (a) ; (b) ; (c) ; (d) . 系统本征态的光子分布　(a) ; (b) ; (c) ; (d)

Fig. 4. The eigen-energy spectrum and photon distributions for edge states of the system under the influence of the next-nearest-neighbor coupling: (a), (d) and (g) show the real parts of the energy spectrum for ; (b), (e) and (h) show the edge states whose energy band are in the upper gaps for ; (c), (f) and (i) show the edge states whose energy bands are in the lower gaps for . 次近邻耦合影响下系统的本征能谱和边缘态的光子分布　(a), (d)和(g)分别为 时本征能谱的实部; (b), (e)和(h)分别为 时上能隙中的边缘态; (c), (f)和(i)分别为 时下能隙的边缘态