Observation of vortices and field correlations in the near-field speckle of a three-dimensional photonic crystal.
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.
Vignolini
Silvia
S
LENS and National Institute for Optics (CNR-INO), IT-50019 Sesto Fiorentino Firenze, Italy. vignolini@lens.unifi.it
Burresi
Matteo
M
Gottardo
Stefano
S
Kuipers
L
L
Wiersma
Diederik S
DS