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Abstract
We report experimental and theoretical arguments showing that the effect of strong enhancement of the light-induced director reorientation in a nematic liquid crystal doped with anthraquinone dye molecules (Jánossy effect) can be related to their aggregation. The torque on the director is due to dependence of the entropy of the aggregate subsystem on the electric field vector relative to the director.
Acknowledgments
We are greatful to O. D. Kachkovskiy, Yu. L. Slominski, A. B. Nych, B. I. Lev, Yu. P. Boiko, Yu. P. Piryatinskiy, Yu. A. Nastyshyn, P. M. Tomchuk, P. J. Collings, S. V. Shiyanovskii, and A. S. Zolot'ko for discussions. The work was supported by NAS of Ukraine via Grant #1.4.1B/109 and CRDF award #UK-P1-2617-KV-04.
