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    Time-dependent scattering in liquid crystals affects light propagation. In nonlinear regimes, self-focusing enhances beam spatial coherence and localization, leading to oscillations and self-steering at high power.

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    Area of Science:

    • Physics
    • Optics
    • Materials Science

    Background:

    • Light propagation in liquid crystals is influenced by molecular disorder.
    • Time-dependent scattering effects are crucial for understanding beam behavior.

    Purpose of the Study:

    • To investigate the impact of time-dependent scattering on light propagation in liquid crystals.
    • To analyze the interplay between disorder and nonlinear optical phenomena.

    Main Methods:

    • Theoretical analysis of light propagation.
    • Examination of linear and nonlinear regimes.
    • Study of beam spatial coherence and localization.

    Main Results:

    • Linear regime: scattering causes monotonic decrease in spatial coherence.
    • Nonlinear regime: self-focusing enhances spatial coherence and localization despite Brownian motion.
    • High power: self-steering and enhanced beam oscillations observed in the non-perturbative regime.

    Conclusions:

    • Time-dependent scattering significantly modifies light propagation in liquid crystals.
    • Nonlinear effects like self-focusing can counteract disorder-induced decoherence.
    • Self-steering emerges as a distinct phenomenon at high optical powers.