US Patent 7700390 Method for fabricating three-dimensional photonic crystal

A method for fabricating a three-dimensional photonic crystal comprises the steps of: forming a dielectric thin film; injecting ions selectively into the dielectric thin film by using a focus ion beam to form a mask on the dielectric thin film; forming a pattern by selectively removing an exposed part of the dielectric thin film at which the mask is not formed on the dielectric thin film; forming a sacrificial layer on the dielectric thin film having the pattern formed therein; and flattening the sacrificial layer formed on the dielectric thin film until the pattern comes to the surface.