Theoretical optimization of complete forbidden bands in woodpile-type photonic crystals  

作　　者：ZHAN Yi ZHENG Yi LI Xiu-Xia 

机构地区：[1]College of Graphic Arts, Qufu Normal University, Rizhao 276826, China [2]College of Science, Beijing Jiaotong University, Beijing 100044, China

出　　处：《Optoelectronics Letters》2008年第5期358-360,共3页光电子快报（英文版）

基　　金：the National Natural Science Foundation of China (No.60478021)

摘　　要：Based on the plane-wave method, the optical properties of complete forbidden bands of woodpile structure photonic crystal with an entire Lattice rotation of 45° in the x-y plane were theoretically studied in terms of height-to-pitch ratios, filling factors, and rotation angles. The calculated results show that the gap to mid-gap ratio changes slightly with a filling fraction ranging from 0.25 to 0.30. The optimum height-to-pitch ratio is about 1.3. The gap to mid-gap ratio reaches more than 0.18 when the rotation angle increases from 40° to 50° and the maximum gap to mid-gap ratio of 0.2 remains unchanged for the rotation angle from 42°to 48° with a constant height-to-pitch ratio of 1.3. The gap to mid-gap ratio reaches the maximum value of 0.2 when the height-to-pitch ratio is 1.3. This woodpile-type photonic crystal can provide large band gaps within a wider parameter range, which makes it convenient to manufacture three-dimensional photonic crystals in the laboratory.

关 键 词：晶体 平面波方法 禁用波段 木料堆结构 

分 类 号：TB383[一般工业技术—材料科学与工程]