Observation of conical scattering cones from a two-dimensional hexagonal photonic crystal based on a polymer-dispersed liquid crystal.
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.
Wu
Shing-Trong
ST
Department of Physics, National Cheng Kung University, Tainan, Taiwan 701.
Li
Ming Shian
MS
Fuh
Andy Ying-Guey
AY