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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 16 — Aug. 3, 2009
  • pp: 13435–13440

Coherent backscattering and dynamical light localization in liquid crystals driven throughout chaotic regimes

Francesco Carbone, Antonio De Luca, Valentin Barna, Sameh Ferjani, Carlo Vena, Carlo Versace, and Giuseppe Strangi  »View Author Affiliations


Optics Express, Vol. 17, Issue 16, pp. 13435-13440 (2009)
http://dx.doi.org/10.1364/OE.17.013435


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Abstract

An important effect of dynamical localization of light waves in liquid crystal electro-hydrodynamic instabilities is reported by investigating coherent backscattering effects. Recurrent multiple scattering in dynamic and chaotic complex fluids lead to a cone of enhanced backscattered light. The cone width and the related mean free path dependence on the dynamic scattering regimes emphasize the diverse light localization scales related to the internal structures present in the sample. The systems investigated up to now were mainly nano-powdered solutions or biological tissues, without any external control on the disorder. Here, an anisotropic complex fluid is “driven” throughout chaotic regimes by an external electric field, giving rise to dynamics that evolve through several spatio-temporal patterns.

© 2009 Optical Society of America

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(160.3710) Materials : Liquid crystals
(280.7060) Remote sensing and sensors : Turbulence
(280.1350) Remote sensing and sensors : Backscattering

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: April 20, 2009
Revised Manuscript: June 13, 2009
Manuscript Accepted: June 15, 2009
Published: July 21, 2009

Citation
Francesco Carbone, Antonio De Luca, Valentin Barna, Sameh Ferjani, Carlo Vena, Carlo Versace, and Giuseppe Strangi, "Coherent backscattering and dynamical light localization in liquid crystals driven throughout chaotic regimes," Opt. Express 17, 13435-13440 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-16-13435


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