The Ultra‐Wide Band Gap Property Induced by Lattice Period Gradually Changing in Three‐Dimensional Photonic Crystals
The Ultra‐Wide Band Gap Property Induced by Lattice Period Gradually Changing in Three‐Dimensional Photonic Crystals
复制标题
DOI：
10.1111/j.1551-2916.2010.04175.x
复制
发表时间：
2010-12
影响因子：
3.9
通讯作者：
Wei Dai;Hong Wang;Di Zhou;Z. Shen;Yong Li;Dichen Li
中科院分区：
文献类型：
--
作者：
Wei Dai;Hong Wang;Di Zhou;Z. Shen;Yong Li;Dichen Li
采用快速成型和凝胶注模成型技术制备了三维金刚石光子晶体，研究了其晶格周期渐变和超宽带隙特性。当晶格周期沿着垂直于电磁波传播方向的方向变化时，带隙宽度和带隙中心频率几乎保持稳定。当晶格周期沿电磁波传播方向沿着拉伸时，带隙的中心频率向低频区移动，而带隙宽度略有增加。将多个沿电磁波传播方向沿着延伸的光子晶体组合在一起，研究其复杂的带隙特性。禁带宽度随组合光子晶体周期的变化而增大。当周期变化率达到134%时，禁带宽度最宽，为理想光子晶体的153%，与Ansoft HFSS模拟结果吻合较好。
The lattice period gradually changing and its ultra-wide band gap property were studied in the three-dimensional diamond photonic crystals (PC) fabricated by rapid prototyping and gel casting techniques using alumina. The band gap width and center frequency of the band gap almost kept stable when the lattice period changed along the direction in vertical to the propagation direction of the electromagnetic wave. When the lattice period stretched along the propagation direction of the electromagnetic wave, the center frequency of the band gap shifted to the lower frequency range while the band gap width increased slightly. Several PCs that stretched along the electromagnetic wave propagation direction were combined together to investigate their complex band gap properties. The band gap width increased with the period change of the combined PCs. When the period change reached 134%, the band gap width became the widest and was 153% of that of the perfect PC, which agreed well with the simulation results by Ansoft HFSS.