title: Observation of vortices and field correlations in the near-field speckle of a three-dimensional photonic crystal.
abstract: We present a phase-sensitive near-field study of speckle fields from photonic crystals in the presence of disorder. We observe phase singularities (vortices) and analyze their statistical properties and screening effects. The experimental results show a clear polarization dependence, not only in their morphological parameters but also in their spatial distribution.
authors.affiliation: LENS and National Institute for Optics (CNR-INO), IT-50019 Sesto Fiorentino Firenze, Italy. vignolini@lens.unifi.it
authors.forename: Silvia
authors.initials: S
authors.lastname: Vignolini
authors.forename: Matteo
authors.initials: M
authors.lastname: Burresi
authors.forename: Stefano
authors.initials: S
authors.lastname: Gottardo
authors.forename: L
authors.initials: L
authors.lastname: Kuipers
authors.forename: Diederik S
authors.initials: DS
authors.lastname: Wiersma