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DY: Fachverband Dynamik und Statistische Physik
DY 18: Pattern Formation
DY 18.3: Vortrag
Dienstag, 18. März 2025, 14:30–14:45, H47
Turbulence-like behavior of spot patterns mediated by defects in the context of the liquid crystal light valve experiment — •Simon Navia1, Marcel Clerc2, and Pedro Aguilera2 — 1University of Münster, Münster Germany — 2University of Chile, Santiago, Chile
The liquid crystal light valve experiment (LCLV) with optical feedback consists of a liquid crystal cell stimulated by a voltage and a photodiode that is coupled to the intensity of the light reaching the cell, thereby creating the optical feedback loop. This experiment exhibits a variety of complex spatiotemporal phenomena. This talk presents the experimental results of the observed formation of aperiodic spatiotemporal patterns in a quasi-one-dimensional channel, characterized by power-law scaling in the temporal and spatial-spectral density of the measured light intensity, as well as in the pseudo-envelope and pseudo-phase. Moreover, theoretically, the system is locally described as being near nascent bistability and spatial instability, from which a simplified model could be derived. We performed numerical simulations of this simplified model which show chaotic spatiotemporal patterns and spectral densities with exponents similar to those observed in the experiment.
[1]Aguilera-Rojas PJ, Clerc MG, Navia S. Opt Lett. 2024 doi: 10.1364/OL.522830.
[2]Verschueren N, Bortolozzo U, Clerc MG, Residori S. Phys Rev Lett. 2013 doi: 10.1103/PhysRevLett.110.104101.
Keywords: Turbulence like-behavior; Non variational systems; Liquid crystals