title: Polarization properties of dipolelike defect modes in photonic crystal nanocavities.
abstract: Far-field measurements of the in-plane polarization properties of spontaneous emission from optical nanocavities formed in two-dimensional photonic crystal slab waveguides are presented. A strong polarization signature, even subthreshold, is found for a pair of highly localized dipolelike resonant modes. This polarization signature is used to study the effects of symmetry lowering within the cavity.
authors.forename: Oskar
authors.initials: O
authors.lastname: Painter
authors.forename: Kartik
authors.initials: K
authors.lastname: Srinivasan