Figure 4.

Real and imaginary part contributions to total diffraction efficiency. Contributions to diffraction efficiency by (a) real part Δ_ε and (b) imaginary part Δ_ε of the IPPC slab, independently. The blue dash-dot lines denote the real/imaginary part Δ_ε. The black solid lines denote real/imaginary part contributions. The red dash lines denote total FODE calculated by using original ε_D and ε_P. The dash-dot-dot vertical line is the resonant absorption wavelength λ₀ of doping agent.