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18 April 2006 Photonic stop bands in opal films and crystalline liquids
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We investigate the optical properties of thin films of two photonic systems: synthetic opal and crystalline liquid BPII. Diffraction related with three-dimensional periodic structure and interference related with light reflection from film surfaces were measured. We found a substantial change of refractive indices at the edges of the photonic bands in both materials. The relation between the frequency and the wave vector of light shows a nonlinear behavior near zone boundary.
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P. V. Dolganov, V. M. Masalov, E. N. Samarov, V. E. Dmitrienko, V. K. Dolganov, and G. A. Emel'chenko "Photonic stop bands in opal films and crystalline liquids", Proc. SPIE 6182, Photonic Crystal Materials and Devices III (i.e. V), 61822B (18 April 2006);

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