MECHANISM OF OPTICAL NONLINEARITY IN “LYOTROPIC LIQUID CRYSTAL — VIOLOGEN” SYSTEM
DOI:
https://doi.org/10.18372/2306-1472.58.6691Keywords:
diffraction efficiency, lyotropic liquid crystals, nonlinear optics, polarizability, viologensAbstract
In the present work we analyze the characteristics of holographic grating recording and consider a mechanism of optical nonlinearity in the lyotropic liquid crystal (LLC) — viologen samples. Taking into account structural and electrooptical properties of the admixture molecules it is possible to suggest that the recording is realized due to the change of polarizability of π-electron system of coloured viologen derivatives under the action of laser radiation. The main nonlinear optical parameters such as nonlinear refraction coefficient n2, cubic nonlinear susceptibility χ(3), and hyperpolarizability γ were calculated.
References
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Eichle,r H. I.; Gunter, P.G.; Pohl, D.W. Laser-induced dynamic gratings. Springer-Verlag, 1986. 258 p.
Garbovskiy, Yu.А.; Klimusheva, G.V.; Bugaychuk, S.A.; Kolesnik, O.H. Holographic grating recording in smectic-dye bi-layer cells. Ukrainian Journal of Physics. 2006. Vol. 51, N 1. P. 11–14 (in Ukrainian).
Garbovskiy, Yu.A.;Gridyakina, A.V.; Klimusheva, G.V.; Tolochko, A.S.; Tokmenko, I.I.; Mirnaya T.A. Tunable optical and nonlinear optical response of smectic glasses based on cobalt alkanoates. Liquid Crystals.2010. Vol. 37, N 11. P.1411–1418.
Gubler, U.; Concilio Ch. Bosshard, S.; Biaggio, I.; Günter, P.; Martin, R. E.; Edelmann, M. J.; Wytko, J. A.; Diederich, F. Third-order nonlinear optical properties of in-backbone substituted conjugated polymers. Appl. Phys. Lett. 2002. Vol.81. P. 2322–2324.
Kasatani, K. Large electronic third-order optical nonlinearities of cyanine dyes measured. by resonant femtosecond degenerate four-wave mixing. Opt. Mat. 2002. Vol.21. P. 93–97.
Sakai, T.; Kawabe, Y.; Ikeda, H.; Kawasaki, K. Third-order nonlinear optical properties of retinal deri¬vatives. Appl. Phys. Lett. 1990. Vol. 56. P. 411–413.
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Published
25-06-2014
How to Cite
Bordyuh, H., & Polishchuk, A. (2014). MECHANISM OF OPTICAL NONLINEARITY IN “LYOTROPIC LIQUID CRYSTAL — VIOLOGEN” SYSTEM. Proceedings of National Aviation University, 58(1), 49–52. https://doi.org/10.18372/2306-1472.58.6691
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MODERN AVIATION AND SPACE TEHNOLOGY
