Speckle analysis of the microwave field in transmission through random media

Patrick Sebbah, Bing Hu, Azriel Z. Genack

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

We explore the specific nature of wave propagation in multiple scattering media and examine how this is revealed in various aspects of the speckle pattern measured at the output surface of an ensemble of disordered media. We present near-field measurements of the speckle pattern transmitted through random samples in a quasi-one dimensional geometry. The microwave field -amplitude and phase- is measured as a function of frequency on a grid of points on the output surface of samples composed of randomly positioned dielectric spheres. The field and intensity correlation functions versus displacement and frequency shift are measured and reveal non-Gaussian behavior, namely long range correlation. The widest fluctuations of the phase derivative with frequency are found at low intensity values near a phase singularity in the transmitted speckle pattern. The position of these phase singularities at which the intensity vanishes is reconstructed for the entire speckle pattern and followed in space while frequency is shifted.

Original languageEnglish
Title of host publicationSpeckle06
Subtitle of host publicationSpeckles, From Grains to Flowers
DOIs
StatePublished - 2006
Externally publishedYes
EventSpeckle06: Speckles, From Grains to Flowers - Nimes, France
Duration: 13 Sep 200615 Sep 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6341
ISSN (Print)0277-786X

Conference

ConferenceSpeckle06: Speckles, From Grains to Flowers
Country/TerritoryFrance
CityNimes
Period13/09/0615/09/06

Keywords

  • Long-range correlation
  • Multiple scattering
  • Phase singularities
  • Photon localization
  • Random media
  • Speckle

Fingerprint

Dive into the research topics of 'Speckle analysis of the microwave field in transmission through random media'. Together they form a unique fingerprint.

Cite this