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研究了宽频折射率可调液体介质在三维光子晶体上的应用。设计了完美结构的液体光子晶体,采用平面波展开法和有限时域差分法研究了液体介质的介电常数对光子晶体带隙的影响规律;采用光固化快速成型技术制造了完美结构光子晶体模型,通过灌注不同介电常数的液体介质,发现液体光子晶体的电磁带隙频率随液体媒介介电常数的升高而向低频移动,其禁带相比于传统液晶可调光子晶体有所拓宽。
The application of broadband refractive index adjustable liquid medium in three-dimensional photonic crystals is studied. A perfectly structured liquid photonic crystal is designed. The effect of the dielectric constant of the liquid medium on the band gap of the photonic crystal is studied by the plane wave expansion method and the finite difference time-domain method. The perfect photonic crystal structure model is fabricated by photo-curing rapid prototyping. Through perfusion of liquid media with different permittivity, it is found that the electromagnetic band gap frequency of liquid photonic crystals shifts to low frequency with the increase of dielectric constant of liquid medium, and the forbidden band broadens compared with that of traditional liquid crystal tunable photonic crystals.