基于FDTD的表面等离子体慢光波导传输特性分析  

Propagation properties analysis for surface plasmons slow light waveguide by FDTD

作　　者：李锋[1] 冯英霞[1] 

机构地区：[1]江苏科技大学电子信息学院,江苏镇江212003

出　　处：《太赫兹科学与电子信息学报》2013年第6期871-874,共4页Journal of Terahertz Science and Electronic Information Technology

摘　　要：表面等离子体可以在亚波长尺度上实现对可见光及红外光的控制处理,对光集成的发展有巨大的推动作用。设计了金属—介质—金属结构的表面等离子光波导,利用时域有限差分法(FDTD)对其色散特性、群速度、场强分布进行分析。结果表明,在一定的频率范围内,此结构的光波导可以支持慢光模式,且群速度色散较小,可有效控制光脉冲的畸变,保持信号的完整性。Surface Plasmons（SPs） can process visible light and infrared light in subwavelength scale, which can provide a huge boost to the development of optical integration. The theoretical basis of the Finite Difference Time Domain（FDTD） method is introduced, and a slow-light waveguide with Metal- Insulator-Metal（MIM） structure is designed. An analysis on dispersion property, group velocity and field intensity distribution of this waveguide is performed with FDTD. It is shown that the waveguide can support slow light propagation and suppress the pulse distortion into some tolerable values simultaneously, when setting the frequency in an appropriate region in the dispersion curve.

关 键 词：表面等离子体 光波导 慢光 时域有限差分 

分 类 号：TN252[电子电信—物理电子学]