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Nonlinear dynamics optically induced in nematic liquid crystals

Russo1, Carbone, Cipparrone

  • 1Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Universita della Calabria, 87036 Rende (CS), Italy.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|November 23, 2000
PubMed
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Researchers studied laser-induced dynamical regimes in liquid crystals. They observed transitions to chaos through Hopf and gluing bifurcations, revealing complex light-matter interactions.

Area of Science:

  • Nonlinear dynamics
  • Liquid crystal physics
  • Optics

Background:

  • Nematic liquid crystals exhibit complex responses to external stimuli.
  • Laser-induced phenomena in liquid crystals are crucial for optical device applications.
  • Understanding dynamical regimes is key to controlling light-matter interactions.

Purpose of the Study:

  • To analyze the dynamical regimes induced in a homeotropically aligned nematic liquid-crystal layer by an s-polarized laser beam.
  • To investigate the transition to chaos in liquid crystal systems under specific laser conditions.
  • To characterize the bifurcations leading to irregular dynamics.

Main Methods:

  • Experimental setup involving a homeotropically aligned nematic liquid-crystal layer.
  • Illumination with an s-polarized laser beam at a small incident angle.

Related Experiment Videos

  • Analysis of the polarization state variation of a probe beam using time series and wavelet transforms.

    • Main Results:

    • Observed dynamical regimes induced by laser irradiation.
    • Identified a sequence of bifurcations: a Hopf bifurcation followed by a gluing bifurcation.
    • Documented a transition to an irregular dynamical regime.

    Conclusions:

    • The study reveals a clear pathway to complex dynamics and chaos in liquid crystals.
    • Experimental results align with theoretical scenarios of transition to chaos via gluing bifurcations.
    • Provides insights into nonlinear optical phenomena in liquid crystal systems.