Fig. 1. Schematic of basic structures of PC. (a) One-dimensional PC; (b) two-dimensional PC; (c) three-dimensional PC

Fig. 2. Structural diagram and reflection spectra of one-dimensional Si/HMDSO PC. (a) Structural diagram of one-dimensional Si/HMDSO PC with double defects prepared by doping Si layers with different thicknesses; (b) reflectivity of 4-cycle one-dimensional Si/HMDSO PC with double defects[19]

Fig. 3. Structural diagram and reflection spectrum of Si/ SiO2 PC. (a) Structural diagrams of Si/SiO2 PC with three different thickness ratios; (b) reflection spectrum of 50-cycle Si/SiO2 heterogeneous PC under three different thickness ratios[21]

Fig. 4. Reflection spectrum of 2-cycle heterostructural PC composed of two one-dimensional CdSe/SiO2 PCs with different periods [25]

Fig. 5. Structural diagram and reflection spectra of one-dimensional Ge/ZnSe PC. (a) Structural diagram of one-dimensional Ge/ZnSe PC structure with Si defect layer; (b) reflectivity of one-dimensional Ge/ZnSe PC[28]

Fig. 6. Reflection spectra of one-dimensional PCs based on different substrates. (a) Si substrate; (b) polystyrene substrate; (c) PET substrate[29]

Fig. 7. SEM image and reflection spectra of one-dimensional heterostructural PC. (a) Cross-sectional SEM image of 48-layer one-dimensional double heterostructural PC; (b) reflection spectra obtained by simulation (solid line) and experiment (dashed line) [32]

Fig. 8. Macroscopic picture and SEM image of one-dimensional Ge/ZnS PC. (a) Photographs of one-dimensional PCs with 4 different colors; (b) cross-sectional SEM image[35]

Fig. 9. SEM image and reflection spectra of chalcogenide glass inverse opal structure. (a) SEM of PC with chalcogenide glass inverse opal structure; (b) reflectivity curves of PCs with SiO2 opal structure, Ge33As12Se55 infiltrated opal structure, and Ge33As12Se55 inverse opal structure[44]