title: Superprism effect in a metal-clad terahertz photonic crystal slab.
abstract: We report an experimental demonstration of the superprism effect in a photonic crystal slab at terahertz frequencies. For a 10% frequency variation around 0.28 THz, the refraction angle at the output facet of a wedge-shaped photonic crystal varies by about 15 degrees. A comparison with the predictions of a band structure calculation demonstrates that a three-dimensional treatment, accurately modeling the finite slab thickness and the metallic boundary conditions, is required for even a qualitative agreement with the experimental observations.
authors.affiliation: Rice University, Department of Chemistry, Houston, Texas 77005, USA.
authors.forename: Tushar
authors.initials: T
authors.lastname: Prasad
authors.forename: Vicki L
authors.initials: VL
authors.lastname: Colvin
authors.forename: Zhongping
authors.initials: Z
authors.lastname: Jian
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Mittleman