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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 24, Iss. 10 — Oct. 1, 2007
  • pp: A33–A38

Observation of singularities in multiply scattered microwave fields

Sheng Zhang, Bing Hu, Yitzchak Lockerman, Patrick Sebbah, and Azriel Z. Genack  »View Author Affiliations


JOSA A, Vol. 24, Issue 10, pp. A33-A38 (2007)
http://dx.doi.org/10.1364/JOSAA.24.000A33


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Abstract

Speckle patterns of arbitrary resolution are obtained by applying the sampling theorem to measurements of two orthogonal components of the microwave field transmitted through multiply scattering samples. Core structures of phase singularities, phase critical points, and polarization singularities are explored. We find that equiphase lines connect phase singularities with opposite topological signs except for the bifurcation lines, which run through a phase saddle point, in agreement with predictions by Freund [ Phys. Rev. E 25, 2348 (1995) ]. We observe hyperbolic equiphase lines near phase saddle points and elliptical equiphase lines around phase extrema. Polarization singularities of the vector field with the three morphologies predicted are observed.

© 2007 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(030.6600) Coherence and statistical optics : Statistical optics
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

History
Original Manuscript: March 27, 2007
Manuscript Accepted: May 15, 2007
Published: August 20, 2007

Virtual Issues
Photonic Metamaterials (2007) JOSA A

Citation
Sheng Zhang, Bing Hu, Yitzchak Lockerman, Patrick Sebbah, and Azriel Z. Genack, "Observation of singularities in multiply scattered microwave fields," J. Opt. Soc. Am. A 24, A33-A38 (2007)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-24-10-A33

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