Fig. 7

(a) Distribution of the electric field |E| for different values of the μ_c parameter, (b) the real and imaginary parts of the n_eff, and (c) the FOM and L_C parameters of the waveguide as a function of the μ_c parameter. The other parameters are w = 120 nm, h = 100 nm, h₁ = 30 nm, h₃ = 20 nm, and λ = 10 μm.