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.
© 2010 Optical Society of America
Original Manuscript: February 22, 2010
Revised Manuscript: April 20, 2010
Manuscript Accepted: May 16, 2010
Published: June 8, 2010
Silvia Vignolini, Matteo Burresi, Stefano Gottardo, L. Kuipers, and Diederik S. Wiersma, "Observation of vortices and field correlations in the near-field speckle of a three-dimensional photonic crystal," Opt. Lett. 35, 2001-2003 (2010)