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制备了胶体晶体,并利用胶体晶体的光子带隙对折射率传感进行了实验研究。从理论上分析了胶体晶体光子带隙中心波长的变化与折射率的关系。通过设计模具制备了胶体晶体-光纤结构,用扫描电镜对胶体晶体的表面进行了观察,并测量了胶体晶体的光子带隙的位置。结果表明胶体晶体的光子带隙的测试结果与理论分析相一致。设计了实验装置,利用光纤间的耦合对胶体晶体的光子带隙的变化进行了测试和分析。结果表明SiO2胶体晶体光子带隙的中心波长为1445.5nm,且在不同折射率液体环境下,其中心波长发生移动,能够形成新的传感机理。对胶体晶体在液体传感上的应用进行了探索。
The colloidal crystals were prepared and the refractive index sensing was experimentally studied by the photonic bandgap of colloidal crystals. The relationship between the change of center wavelength and the refractive index of photonic bandgap in colloidal crystals is theoretically analyzed. The colloidal crystal - fiber structure was prepared by designing the mold. The surface of the colloidal crystal was observed by scanning electron microscopy and the photonic bandgap position of the colloidal crystal was measured. The results show that the colloidal crystal photonic bandgap test results consistent with the theoretical analysis. The experimental device was designed and the changes of photonic bandgap of colloidal crystals were tested and analyzed by the coupling between optical fibers. The results show that the central wavelength of the photonic bandgap of SiO2 colloidal crystal is 1445.5nm, and the central wavelength of the colloidal crystal of SiO2 colloidal crystal moves under the different refractive index liquid environment, which can form a new sensing mechanism. The application of colloidal crystals in liquid sensing has been explored.