Abstract
Some new optical properties of a stack consisting of cholesteric liquid crystal (CLC) and isotropic medium layers are studied. The problem is solved by the modified Ambartsumyan method for the summation of layers. Bragg conditions for the photonic band gaps of the proposed system are presented. It is shown that the choice of proper sublayer parameters can be used to control the band structure of the system. In the general case, the effect of full suppression of absorption, which is observed in a finite homogeneous CLC layer, is not detected in the presence of anisotropic absorption in CLC sublayers. It is shown that this effect can be generated in the system under study if certain conditions are imposed on the isotropic sublayer thickness. Under these conditions, the maximum photonic density of states (PDS) increases significantly at the boundaries of the corresponding band. The influence of a change in the CLC sublayer thickness and the system thickness on PDS is investigated.
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Original Russian Text © A.H. Gevorgyan, 2015, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 148, No. 6, pp. 1248–1256.
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Gevorgyan, A.H. Optical properties of a stack of cholesteric liquid crystal and isotropic medium layers. J. Exp. Theor. Phys. 121, 1096–1103 (2015). https://doi.org/10.1134/S1063776115120122
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DOI: https://doi.org/10.1134/S1063776115120122