摘要
提出了一种基于复式晶格结构的新型THz波段光子晶体谐振腔,这种复式晶格结构是在普通正方空气孔型光子晶体的每个原胞中心嵌套一个旋转28.2°的正方形空气孔,通过改变中心原胞内圆柱空气孔的半径构成谐振腔,用平面波法分析谐振频率与缺陷半径的关系,得到TM谐振模和TE谐振模一致的谐振腔结构参数;利用时域有限差分法分析共同谐振的TM模和TE模的谐振特性,研究结果可以为THz波段光子晶体谐振腔的制作提供参考依据.
A novel terahertz resonant cavity based on compound lattice photonic crystal is presented. The compound lattice photonic crystal is formed by inserting a square pillar,which is rotated by 28.2° ,in the centre of each prime cell of the common square-pillar-typed photonic crystal,with the resonant cavity created by varying the radius of a circular pillar in the central prime cell. Plane wave expansion method is used to simulate the band gap structure and analyze the relationships between resonant frequency and the defect radius, obtaining the resonant cavity＇s structure parameters which make the TM mode resonate with the TE mode. Finite difference time domain method is used to analyze the resonant characteristics of the TM resonant mode and the TE resonant mode. These research results can provide theoretical basis for manufacture of photonic crystal resonant cavity used in terahertz range.
出处
《南京信息工程大学学报（自然科学版）》
CAS
2010年第1期13-18,共6页
Journal of Nanjing University of Information Science & Technology（Natural Science Edition）
基金
南京邮电大学科研基金(NY207053)
关键词
光电子学与激光技术
复式晶格
谐振腔
太赫兹波
optoelectronic and laser technology
compound lattice
resonant cavity
terahertz wave
