Tetrastack: Colloidal diamond-inspired structure with omnidirectional photonic band gap for low refractive index contrast
Tetrastack: Colloidal diamond-inspired structure with omnidirectional photonic band gap for low refractive index contrast
复制标题
DOI：
10.1063/1.2206111
复制
发表时间：
2006-06-12
影响因子：
4
通讯作者：
Joannopoulos, JD
中科院分区：
文献类型：
--
作者：
Ngo, TT;Liddell, CM;Joannopoulos, JD
已经发现非球形胶体光子晶体结构在低折射率对比度下打开全向光子带隙。描述了由胶体四面体组成的类金刚石光子晶体的机械稳定设计。所提出的四叠层结构在大范围的填充分数、折射率对比和构建块方向上显示出全向 2-3 带隙。倒置四叠层结构的阈值折射率为1.94。对于硅填充分数为 0.21 的倒置四叠层，获得了相对于中心频率 25.3% 的间隙宽度。 (c) 2006 年美国物理研究所。
Omnidirectional photonic band gaps opening at low values of refractive index contrast have been found for a nonspherical colloid-based photonic crystal structure. A mechanically stable design is described for the diamondlike photonic crystal composed of colloidal tetrahedra. The proposed tetrastack structure displays omnidirectional 2-3 band gap over a large range of filling fractions, refractive index contrasts, and building block orientations. The threshold refractive index for the inverted tetrastack structure was 1.94. A gap width of 25.3% relative to the center frequency was obtained for an inverted tetrastack with a 0.21 filling fraction of silicon. (c) 2006 American Institute of Physics.