To reduce the radiation of silica, a low-radiation material can be wrapped around the silica to form a core from Figure 7. It is essential to choose a material with a high refractive index for the photonic crystal system with the wurtzite hexagonal phase [27].Zinc oxide was found to be a semiconductor material. Excellent and low infrared radiation and have a suitable refractive index Therefore, it is a possible choice for cladding materials.