Figure 2

Dispersion.

Dispersion relations of k_ωa/π(≡Re K_ωa/π) versus ω/ν [solid line], and κ_ωa/π(≡Im K_ωa/π) versus ω/ν [dashed line] of photonic field propagating in an array of SHO. The blue line represents the dispersion relation for free photon. Here we choose g²/a = 1/2, ν = π/20, λ = ν/10, δ = ν/200.