Heterostructural photonic crystals (HPC) have attracted considerable interest due to its large photonic bandgap. Here we report a facile method to calculate and fabricate the heterostructural photonic crystals by using optical transfer-matrix method and polystyrene (PS) spheres with different particle sizes. Results suggest that the numerical simulation match well with the experimental spectra. In addition, compared with the single-structural photonic crystals (SPC), the HPCs have larger photonic bandgap, which is equal to a total of the photonic bandgaps of each SPC. Therefore, the HPCs with large bandgap can be well designed and then synthesized.
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