Fig. 1. Equivalent interface of monolayer thin film

Fig. 2. Electric field of monolayer film

Fig. 3. Simulated and calculated reflectivity at different film thicknesses.(a) nHd1=nLd2=λ/3.5; (b) nHd1=nLd2=λ/4; (c) nHd1=nLd2=λ/4.5

Fig. 4. Photonic band gap of λ/4 dielectric film obtained under different conditions.(a) nH=3.5, nL=1.6; (b) nH=4, nL=1.4

Fig. 5. (a) Lattice view and (b) reflectance spectrum of one-dimensional double hetero-structure photonic crystal

Fig. 6. (a) Lattice view and (b) reflectance spectrum of one-dimensional metal enhanced photonic crystal