Fabrication and Photonic Band Gap Property of Silica Colloidal Crystals
二氧化硅胶体晶体的制备及其光子带隙特性

Two kinds of silica colloidal crystals were fabricated by the self-assembly of mono- disperse silica particles. Optical microscope images show that the samples axe polycrystalline. Transmission measurements show the existence of photonic band gaps, and the center of which is strongly determined by the size of the colloidal spheres. With aging-time increasing the photonic band gap shifts considerably towards shorter wavelength.