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.
© 2008 Optical Society of America
Diffraction and Gratings
Original Manuscript: July 29, 2008
Revised Manuscript: October 8, 2008
Manuscript Accepted: October 8, 2008
Published: November 19, 2008
Shing-Trong Wu, Ming Shian Li, and Andy Ying-Guey Fuh, "Observation of conical scattering cones from a two-dimensional hexagonal photonic crystal based on a polymer-dispersed liquid crystal," Opt. Lett. 33, 2758-2760 (2008)