金属-介质-金属型纳米波导光栅的滤波特性与结构优化  

The filtering characteristics and structure optimization of the metal-dielectric-metal nano-waveguide gratings

作　　者：高兴宇[1] 郭云峰 骆魁桢 GAO Xingyu;GUO Yunfeng;LUO Kuizhen(School of Mechatronic Engineering,Guilin University of Electronic Technology,Guilin 541004,China;School of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学机电工程学院,广西桂林541004 [2]桂林电子科技大学电子工程与自动化学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2019年第6期478-482,共5页Journal of Guilin University of Electronic Technology

基　　金：广西自然科学基金(2015GXNSFBA139245)。

摘　　要：为了提高传输效率,设计了一种金属-介质-金属型(MDM)波导的光栅结构,使用时域有限差分(FDTD)算法对该光栅结构的透射性能进行仿真。通过优化该波导光栅的结构、材料等性质,仿真研究可见光至红外光通过该波导光栅的透射情况。仿真结果表明,在可见光范围内该波导结构具有良好的透射性能,在材料为金的波导中,对波长450 nm的光透射率达到82.8%,在材料为银的波导中,对波长400~450 nm的光透射率达到了75%。经结构优化后,在可见光范围内,光栅周期为450 nm时,该结构透射率达到86%。In order to obtain a high transmission efficiency waveguide structure,a metal-dielectric-metal waveguide(MDM)grating structure is designed in this paper.The transmission performance of the grating structure is simulated by using finite-difference time-domain(FDTD)algorithm.The transmission of the visible to infrared spectrum through the waveguide grating is investigated by optimizing the structure,materials and other parameters of the waveguide grating.The results show that the waveguide structure has good transmission performance in the visible light range.The optical transmittance to 450 nm is 82.8% in the gold waveguide and 75%to the wavelength 400-450 nm in the silver waveguide.When the grating period is 450nm,the transmittance of the structure reaches 86% after the optimization of the structure in the visible range.

关 键 词：表面等离子体 时域有限差分算法 光栅 MDM波导 滤波器件 

分 类 号：O436[机械工程—光学工程]