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Interplay between multiple scattering and optical nonlinearity in liquid crystals

: Alberucci, A.; Jisha, C.P.; Bolis, S.; Beeckman, J.; Nolte, S.


Optics Letters 43 (2018), No.15, pp.3461-3464
ISSN: 0146-9592
Journal Article
Fraunhofer IOF ()

We discuss the role played by time-dependent scattering on light propagation in liquid crystals. In the linear regime, the effects of the molecular disorder accumulate in propagation, yielding a monotonic decrease in the beam spatial coherence. In the nonlinear case, despite the disorder-imposed Brownian-like motion to the self-guided waves, self-focusing increases the spatial coherence of the beam by inducing spatial localization. Eventually, a strong enhancement in the beam oscillations occurs when power is strong enough to induce self-steering, i.e., in the non-perturbative regime.