To attainment of pronounced structural coloring of a photonic crystal fiber

The conditions for obtaining pronounced structural coloring of a photonic crystal fiber with hexagonal symmetry are defined. It is shown that the parameters of the fiber should be selected in accordance with the configuration of the bandgaps of a two-dimensional photonic crystal formed by air channels filling the fiber. The conclusions of the band theory are confirmed by calculating the scattering cross sections of photonic crystal fibers made of polyethylene terephthalate with a circular outer boundary.