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基于平面波展开法研究木堆结构三维光子晶体带隙特性。用硅材料构成木堆结构三维光子晶体,改变结构中木条的宽度和长度,得到当木堆条宽度为5μm,高度为7μm时形成的带隙结构较宽,在0.2899—0.3804Hz,带隙宽度为0.0905Hz。改变构成木堆结构三维光子晶体的材料,得到锗材料构成木堆结构三维光子晶体带隙结构在0.2585—0.3500Hz,带隙宽度为0.0915Hz,带隙相比硅材料和碳化硅材料较宽。研究结论为三维光子晶体的制备提供参考。
Study on Bandgap Characteristics of 3D Photonic Crystal in Woodpile Based on Planar Wave Expansion Method. The three-dimensional photonic crystal of wood-stack structure is made of silicon material, and the width and length of the wood in the structure are changed. The bandgap structure formed when the width of the wood heap is 5 μm and the height is 7 μm is wide, and the band gap is 0.2899-0.3804 Hz, The width is 0.0905Hz. The material of the three-dimensional photonic crystal that constitutes the woodpile structure is changed to obtain the germanium material to form the woodpile structure. The band gap structure of the three-dimensional photonic crystal at 0.2585-0.3500 Hz and the bandgap width is 0.0915 Hz, and the band gap is wider than the silicon material and the silicon carbide material. The research conclusion provides a reference for the preparation of three-dimensional photonic crystals.