title: Negative refraction and left-handed electromagnetism in microwave photonic crystals.
abstract: We demonstrate the negative refraction of microwaves in a metallic photonic crystal prism. The spectral response of the photonic crystal prism, which manifests both positive and negative refraction, is in complete agreement with band-structure calculations and numerical simulations. The validity of Snell's law with a negative refractive index is confirmed experimentally and theoretically. The negative refraction observed corresponds to left-handed electromagnetism that arises due to the dispersion characteristics of waves in a periodic medium. This mechanism for negative refraction is different from that in metamaterials.
authors.affiliation: Department of Physics and Electronic Materials Research Institute, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, USA.
authors.forename: P V
authors.initials: PV
authors.lastname: Parimi
authors.forename: W T
authors.initials: WT
authors.lastname: Lu
authors.forename: P
authors.initials: P
authors.lastname: Vodo
authors.forename: J
authors.initials: J
authors.lastname: Sokoloff
authors.forename: J S
authors.initials: JS
authors.lastname: Derov
authors.forename: S
authors.initials: S
authors.lastname: Sridhar