The Research Of Devices Of One-dimensional Liquid Crystal And Photonic Crystal

There are many advantages for one-dimensional photonic crystal, such as simple technology of leading into defects, easy integration, low driving voltage, low cost, diversity and good tuning performance. So, it will play an important role in the all-optical networks whose carriers are photons and it has become a hot research for photonic crystals. This paper investigates one-dimensional liquid crystal photonic crystal devices and its main contents include the following aspects:At first, simulate the transmission spectrums of one-dimensional photonic crystal device separately with different media materials, different thickness ratios of dielectric layers, different incident angles and different number of cycles using transfer matrix method and MATLAB language. And receive the regulars that the location and width of the photonic band gap vary with the variation of these parameters. Select the appropriate parameters to produce SiO₂/TiO₂ multilayer one-dimensional photonic crystal devices according to the theoretical simulation. Measure their transmission spectrum by infrared spectrometer and analyze the properties of photonic band gap.Secondly, design one-dimensional liquid crystal and photonic crystal filter and simulate its transmission spectrum using MATLAB language. And get the regulars that the location of transmission peak for filters changes with the variation of the thickness of liquid crystal layer, refractive index and the cycles. Manufacture one-dimensional liquid crystal and photonic crystal filter according to the theoretical simulation and measure its transmission spectrum by infrared spectrometer. Finally, analyze the filtering properties.At last, simulate the transmission spectrums of cholesteric liquid crystal with unique helix in the visible range by MATLAB language. Manufacture cholesteric liquid crystal device in planar texture using anti-parallel friction orientation technical and measure its transmission spectrum by UV-Vis spectrophotometer. Finally, make a conclusion according to the theoretical simulation and experimental results: cholesteric liquid crystal device in planar texture has photonic band gap.