title: Observation of conical scattering cones from a two-dimensional hexagonal photonic crystal based on a polymer-dispersed liquid crystal.
abstract: We explore axial scattering from a two-dimensional hexagonal photonic crystal based on a polymer-dispersed liquid crystal at normal incidence. The scattering reveals symmetric cones over a range of frequencies. The observed cones disperse strongly outward, and their radii are determined by the wavelength of the probe beam. Such cones are generated by the coupling of forward-scattered beams of the refracted beams and the refracted beams themselves under momentum conservation.
authors.affiliation: Department of Physics, National Cheng Kung University, Tainan, Taiwan 701.
authors.forename: Shing-Trong
authors.initials: ST
authors.lastname: Wu
authors.forename: Ming Shian
authors.initials: MS
authors.lastname: Li
authors.forename: Andy Ying-Guey
authors.initials: AY
authors.lastname: Fuh