2D-3D异质结结构中集成波导的优化  

Optimization of an integrated waveguide in a 2D-3D heterostructure

作　　者：林捷 冯志芳[1] 冯帅[2] LIN Jie;FENG ZhiFang;FENG Shuai(Faculty of Science, Beijing University of Chemical Technology, Beijing 100029;Faculty of Science, Minzu University of China, Beijing 100081, China)

机构地区：[1]北京化工大学理学院,北京100029 [2]中央民族大学理学院,北京100081

出　　处：《北京化工大学学报（自然科学版）》2019年第3期112-116,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：教育部留学回国人员科研启动基金(LXHG2014001);国家自然科学基金(11374378/61775244);北京化工大学学科建设基金(XK1702)

摘　　要：为了探究光子晶体在多方向上的传输特性,采用时域有限差分方法系统地设计、模拟和分析了太赫兹波段下2D-3D异质结结构中的波导集成器件。通过对垂直波导和输出波导的优化设计发现,减小垂直波导中邻近微腔之间的旋转角度可以有效提高集成波导的传输效率;增宽输出波导时,导带范围和传输效率进一步得到了改善。另外通过设计研究了多方向传输的集成波导器件,证明其各方向都具有良好的传输效率。In order to investigate the omni-directional transmission of a photonic crystal, a waveguide integrated de-vice in a 2D-3D heterostructure working at terahertz wavelengths has been designed, simulated and analyzed. By optimization of the design for the vertical waveguide and the output waveguide, we found that the transmission effi-ciency can be improved significantly by reducing the rotation angle between the adjacent microcavities. When the output waveguide is widened, the band range and transmission efficiency are improved further. A waveguide inte- grated device including four input waveguides has also been designed and studied. The results show that all direc-tions have good output efficiency.

关 键 词：波导 集成器件 时域有限差分法 

分 类 号：TN256[电子电信—物理电子学]