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设计了简易的压强可控自组装实验装置,制备了由直径为260nm的聚苯乙烯(PS)胶体球组成的面心立方光子晶体。分析了压强的变化对光子禁带(PBG)深度及光子带隙边缘(PBE)坡度的影响,确定了合适的压强生长环境(P=5999.5Pa)。利用该实验装置,还进行了光子晶体的小批量制备,一次性制得了三块光子晶体,并从不同角度对每一块光子晶体的透射谱及不同光子晶体的透射谱进行了测量。同一光子晶体不同位置透射谱的重合、同一批次制备的不同光子晶体透射谱的一致性及光子禁带两侧的Fabry-Prot振荡等均说明:该装置制备的光子晶体在大区域、大面积上是高度有序、均一和平整的;利用该实验装置进行光子晶体的小批量制备是可行的。
A simple pressure-controlled self-assembly experimental apparatus was designed and a face centered cubic photonic crystal composed of polystyrene (PS) colloidal spheres with a diameter of 260 nm was prepared. The influence of pressure on the depth of photonic band gap (PBG) and the edge of photonic bandgap (PBE) was analyzed, and the proper pressure growth environment (P = 5999.5Pa) was determined. With this experimental setup, a small batch of photonic crystals was also prepared. Three photonic crystals were prepared in one time. The transmission spectra of each photonic crystal and the transmission spectra of different photonic crystals were measured from different angles. The coincidence of the transmission spectra at different positions of the same photonic crystal, the coincidence of the transmission spectra of different photonic crystals prepared in the same batch and the Fabry-Protting oscillations on both sides of the photonic band gap all indicate that the photonic crystals prepared in the device have a large area, Large area is highly ordered, uniform and smooth; using this experimental device for photonic crystals in small batch preparation is feasible.