Light valve based on photonic crystal with LC layer

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Год издания: 2007

Ключевые слова: Defect modes, Electrooptical switching, Light valve, Nematic liquid crystals, Photonic bandgap materials, Crystal atomic structure, Crystal structure, Crystallography, Defects, Electrooptical materials, Energy gap, Light sources, Liquid crystals, Mirrors, Photonic crystals, Powders, Applied voltages, Bandgap, Crossed polarizers, Crystal cells, Defect modes, Electrooptical switching, Glass substrates, Initial states, ITO electrodes, LC layers, Light valve, Light valves, Multilayer mirrors, Nematic layers, Phase retardations, Photonic bandgap materials, Regular structures, Spectral positions, Spectral ranges, Nematic liquid crystals

Аннотация: Photonic crystal/liquid crystal cell has been developed as a light valve within narrow spectral range. The cell consists of two identical multilayer mirrors deposited on the glass substrates with ITO electrodes. The gap between the mirrors was filled by the nematic liquid crystal aligned planar in the initial state. The nematic layer plays a part of the defect in the regular structure causing the appearance of the spectral windows (defect modes) inside the photonic crystal bandgap. The cell was placed between two crossed polarizers. The transmittance for the light passed through the valve depends on the matching of wavelengths for the defect modes of two polarizations and their relative phase retardation. In turn the spectral position of defect modes and the phase retardation are controlled by applied voltage that may result both in the addition and diminution of the defect modes intensities. This effect has been demonstrated within the spectral range corresponding to one of the defect modes.

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Издание

Журнал: SID Conference Record of the International Display Research Conference

Номера страниц: 265-267

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