光子学报, 2018, 47 (1): 0123002, 网络出版: 2018-01-30   

一维光子晶体纳米梁腔结构参量对带隙特性的影响

Effect of Structural Parameters of One-dimensional Photonic Crystal Nanobeam Cavity on Its Bandgap Characteristics
祝欣 1,*刘克 1,2
作者单位
1 北京工业大学 信息学部 光电子技术省部共建教育部重点实验室, 北京 100124
2 Department of Electrical and Computer Engineering, George Washington University, Washington, DC 20052, USA
摘要
采用解析表达式的方法对一种一维光子晶体结构模型进行理论分析, 通过三维时域有限差分数值计算仿真孔洞型一维光子晶体各结构参量对其带隙特性的影响.仿真结果表明孔洞周期和半径、InGaAsP波导宽度、下包层折射率以及填充系数等参量的变化都会对其带隙带宽和中心频率产生较大影响.设计具有特定谐振波长的一维光子晶体纳米梁腔实例, 得到的谐振波长为1 561.7 nm、品质因子达104 量级.带隙特性的研究对于由一维光子晶体构成的光子集成器件如激光器、调制器等具有重要的指导意义.
Abstract
One-dimensional (1D) photonic crystal structure model was theoretically analyzed through analytical expressions with various structural parameters. The bandgap characteristics of the 1D photonic crystal resulting from the structural parameters were further simulated by a three-dimensional time domain finite difference numerical method. The results show that the bandwidth and center frequency of the 1D photonic crystal bandgap are significantly influenced by hole period and radius, InGaAsP waveguide width, refractive index of bottom cladding, and filling factor. A 1D photonic crystal nanobeam cavity is successfully designed for a Q-factor up to 104 with a designated resonant wavelength of 1 561.7 nm, showing the validation and practicability of the aforementioned results. The study of bandgap characteristics of 1D photonic crystal structure produces an important effect on the integrated photonic components such as formed lasers and modulators.

祝欣, 刘克. 一维光子晶体纳米梁腔结构参量对带隙特性的影响[J]. 光子学报, 2018, 47(1): 0123002. ZHU Xin, LIU Ke. Effect of Structural Parameters of One-dimensional Photonic Crystal Nanobeam Cavity on Its Bandgap Characteristics[J]. ACTA PHOTONICA SINICA, 2018, 47(1): 0123002.

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