为了优化3维木堆结构光子晶体的结构参量,采用平面波展开法,从高度和周期之比、填充率、晶格与 x 轴的夹角3方面理论分析了3维木堆结构光子晶体完全禁带的性质。当填充率在0.25～0.3之间变化时,带隙比变化很小。最佳高度和周期之比为1....为了优化3维木堆结构光子晶体的结构参量,采用平面波展开法,从高度和周期之比、填充率、晶格与 x 轴的夹角3方面理论分析了3维木堆结构光子晶体完全禁带的性质。当填充率在0.25～0.3之间变化时,带隙比变化很小。最佳高度和周期之比为1.3。当晶格与 x 轴的夹角在40°～50°之间变化时,带隙比超过0.18。当高度和周期之比等于1.3,旋转角度在42°～48°之间变化时,最大带隙比为0.2保持不变。结果表明,3维木堆结构光子晶体的结构参量调节范围比较宽。这一结果为实验室制备带来方便。展开更多
It is of great significance to present a photonic crystal lattice structure with a wide photonic bandgap. A two-dimension complex lattice photonic crystal is proposed. The photonic crystal is composed of complex latti...It is of great significance to present a photonic crystal lattice structure with a wide photonic bandgap. A two-dimension complex lattice photonic crystal is proposed. The photonic crystal is composed of complex lattices with triangular structure, and each single cell is surrounded by six scatterers in an hexagon. The photonic band gaps are calculated based on the plane wave expansion (PWE) method. The results indicate that the photonic crystal has tunable large TM polarization band gap, and a gap-midgap ratio of up to 45.6%.展开更多
文摘为了优化3维木堆结构光子晶体的结构参量,采用平面波展开法,从高度和周期之比、填充率、晶格与 x 轴的夹角3方面理论分析了3维木堆结构光子晶体完全禁带的性质。当填充率在0.25～0.3之间变化时,带隙比变化很小。最佳高度和周期之比为1.3。当晶格与 x 轴的夹角在40°～50°之间变化时,带隙比超过0.18。当高度和周期之比等于1.3,旋转角度在42°～48°之间变化时,最大带隙比为0.2保持不变。结果表明,3维木堆结构光子晶体的结构参量调节范围比较宽。这一结果为实验室制备带来方便。
基金supported by the Special Foundation for Harb-in Young Scientists (Grant Number 2008RFQXG031)the Ba-sic Research Foundation of Harbin Engineering University.
文摘It is of great significance to present a photonic crystal lattice structure with a wide photonic bandgap. A two-dimension complex lattice photonic crystal is proposed. The photonic crystal is composed of complex lattices with triangular structure, and each single cell is surrounded by six scatterers in an hexagon. The photonic band gaps are calculated based on the plane wave expansion (PWE) method. The results indicate that the photonic crystal has tunable large TM polarization band gap, and a gap-midgap ratio of up to 45.6%.
