Colloidal Photonic Crystals Self-Assembled onto the Optical Fiber Substrates

We report the experimental demonstration of colloidal crystal deposited on the end face of fiber, as well as the side cladding. The colloidal photonic crystals were fabricated through isothermal heating evaporation-induced self-assembly. The resulted samples were characterized structurally by scanning electronic microscope (SEM) and optically by transmission spectra analyzer. A moderately transmission dip at 1543 nm and 1546 nm wavelength coincides with the photonic band gap expected for the 710 nm silica microspheres.