Multiple Bragg diffraction in low-contrast photonic crystals based on synthetic opals |
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Authors: | A V Moroz M F Limonov M V Rybin K B Samusev |
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Institution: | 1.Ioffe Physical-Technical Institute,Russian Academy of Sciences,St. Petersburg,Russia |
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Abstract: | The phenomenon of multiple Bragg diffraction in low-contrast photonic crystals based on synthetic opals has been studied both
experimentally and theoretically. The transmission and reflection spectra of opal films near the K point of the Brillouin zone of the face-centered cubic lattice in s-polarization exhibit the effect of anticrossing of dispersion curves corresponding to the (111) and (`1]11)(\bar 111) photonic stop bands. The effect of quasi-Brewster suppression of stop bands is clearly pronounced in p-polarization. The experimental data are analyzed using the calculation of the band structure of opal with the inclusion of
the polarization of incident light. |
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