Fig. 1. Curves of model parameters versus normalized frequency in (a)-(f) self-defocusing and (g)-(l) self-focusing nonlinear metamaterials when ω_m/ω_p=0.9,1.0,1.1

Fig. 2. Curves of restrict condition versus normalized frequency in (a)-(c) self-defocusing and (d)-(f) self-focusing nonlinear metamaterials when ω_m/ω_p=0.9,1.0,1.1

Fig. 3. Distributions of quasi-soliton in (a)-(c) self-defocusing and (d)-(f) self-focusing nonlinear metamaterials

Fig. 4. Evolutions of quasi-soliton after propagating 10λ_p when ω_m/ω_p=0.9. (a) Self-defocusing nonlinear metamaterials; (b) self-focusing nonlinear metamaterials