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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 21 — Nov. 1, 2009
  • pp: 3295–3297

Light-induced dielectric structures and enhanced self-focusing in critical photorefractive ferroelectrics

A. Ciattoni, C. Rizza, E. DelRe, and A. Marini  »View Author Affiliations


Optics Letters, Vol. 34, Issue 21, pp. 3295-3297 (2009)
http://dx.doi.org/10.1364/OL.34.003295


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Abstract

We consider the nonlinear dynamics occurring when an optical beam couples to dielectric material polarization in an unbiased photorefractive crystal undergoing a ferroelectric phase transition. The polarization profile produced by the light-induced electric field is evaluated by means of the Landau–Ginzburg approach and is found to manifest new thermodynamical states with their own specific nonlinear optical effects. We show that a temperature T C , lower than the critical one, exists such that (a) if T > T C the optical beam experiences an increasing self-focusing for decreasing temperatures and (b) if T < T C the optical beam allows the existence of thermodynamically metastable states associated with an optical ultra-self-focusing effect.

© 2009 Optical Society of America

OCIS Codes
(000.6850) General : Thermodynamics
(190.5330) Nonlinear optics : Photorefractive optics

ToC Category:
Nonlinear Optics

History
Original Manuscript: June 12, 2009
Revised Manuscript: September 14, 2009
Manuscript Accepted: September 29, 2009
Published: October 23, 2009

Citation
A. Ciattoni, C. Rizza, E. DelRe, and A. Marini, "Light-induced dielectric structures and enhanced self-focusing in critical photorefractive ferroelectrics," Opt. Lett. 34, 3295-3297 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-21-3295


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References

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