title: Optical trirefringence in photonic crystal waveguides.
abstract: We demonstrate that 2D photonic crystals can possess optical trirefringence in which there are six field orientations for which linear incident light is not perturbed on reflection or transmission. Such a property is rigorously forbidden in homogeneous nonmagnetic dielectrics which can possess only optical birefringence. We experimentally demonstrate this phenomena in silicon-based mesostructures formed from photonic crystal waveguides embedded in a Fabry-Perot cavity. Multirefringence is controlled by the presence of submicron dielectric patterning and is well explained by an exact scattering matrix theory.
authors: Department of Physics & Astronomy, University of Southampton, SO17 1BJ, United Kingdom.
authors: M C
authors: MC
authors: Netti
authors: A
authors: A
authors: Harris
authors: J J
authors: JJ
authors: Baumberg
authors: D M
authors: DM
authors: Whittaker
authors: M B
authors: MB
authors: Charlton
authors: M E
authors: ME
authors: Zoorob
authors: G J
authors: GJ
authors: Parker