Scattering at visible frequencies from a two-dimensional silica/air photonic crystal material in the form of a fine fiber reveals the hexagonal crystal structure of the material. Oblique illumination allows the observation of first-order Bragg conditions even for a crystal structure with a pitch several times the wavelength of light. These scattering measurements demonstrate the feasibility of a low-loss waveguide based on photonic bandgap effects.
© 1998 Optical Society of America
Jonathan C. Knight, Tim A. Birks, Philip St. J. Russell, and John G. Rarity, "Bragg Scattering from an Obliquely Illuminated Photonic Crystal Fiber," Appl. Opt. 37, 449-452 (1998)