Fig. 1. Schematic of PT-symmetric planar waveguide

Fig. 2. Curves of refractive-index distribution function V(X) and gain/loss distribution function W(X)(V₀=1, W₀=0.8, η=1)

Fig. 3. Propagation evolutions of fundamental-mode Gaussian optical waves in ordinary Kerr nonlinear media waveguide which only includes diffraction and nonlinear effect, when V₀=0 and W₀=0. (a) η=0.7; (b) η=1; (c) η=2; (d) η=3

Fig. 4. Waveform of fundamental-mode Gaussian optical wave and curves of refractive-index distribution function when V₀=1

Fig. 5. Propagation evolutions of fundamental-mode Gaussian optical waves in Gaussian PT-symmetric Kerr nonlinear waveguide when V₀=1 and W₀=0.8. (a) η=0.7; (b) η=1; (c) η=2; (d) η=3

Fig. 6. Propagation evolutions of fundamental-mode Gaussian optical waves in Gaussian PT-symmetric Kerr nonlinear waveguide when W₀=0.8 and η=1. (a) V₀=1; (b) V₀=2; (c) V₀=3; (d) V₀=4

Fig. 7. Propagation evolutions of fundamental-mode Gaussian optical waves in Gaussian PT-symmetric Kerr nonlinear waveguide when V₀=1 and η=1. (a) W₀=0.8; (b) W₀=0; (c) W₀=-0.8

Fig. 8. Waveform of first-order Gaussian optical wave and curves of refractive-index distribution function V(X) when η=1

Fig. 9. Propagation evolutions of first-order Gaussian optical wave in Gaussian PT-symmetric Kerr nonlinear waveguide when W₀=0 and η=1. (a) V₀=1; (b) V₀=2; (c) V₀=3; (d) V₀=4

Fig. 10. Propagation evolutions of first-order Gaussian optical waves in Gaussian PT-symmetric Kerr nonlinear waveguide when V₀=4 and η=1. (a) W₀=0.8; (b) W₀=0; (c) W₀=-0.8

Fig. 11. Waveform of second-order Gaussian optical wave and curves of refractive-index distribution function V(X) when η=1

Fig. 12. Propagation evolutions of second-order Gaussian optical waves in Gaussian PT-symmetric Kerr nonlinear waveguide when W₀=0 and η=1. (a) V₀=0; (b) V₀=1; (c) V₀=2; (d) V₀=3