Abstract
We report on the fabrication and properties of ceramic photonic glass, a disordered arrangement of monodisperse ceramic spheres with diameters in the range of the wavelengths of incident light. These novel materials are produced as solid thin films which can be used for a wide range of applications, such as broadband visible reflectors, thermal radiation barrier coatings, high temperature stable structural coloration, resonant random lasers and media for photonic Anderson localization. Large nearly monodisperse spheres of different sizes were obtained by methods of sol–gel chemistry. Photonic glass films with layer thickness varied in the range 7–100 μm were deposited by drop casting from suspensions in ethylene glycol. Larger particles demonstrate a larger spectral window of broadband reflection. For thermal barrier coating applications strong reflection in the wavelength range of 1–6 μm is obtained with particles close to 3 μm diameter.
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