量子电子学报 ›› 2023, Vol. 40 ›› Issue (6): 983-991.doi: 10.3969/j.issn.1007-5461.2023.06.018

• 纤维与波导光学 • 上一篇    

基于表面等离子激元的多通道滤波器设计

张兴娇 1*, 曾礼丽 2, 文如泉 1, 廖建波 1, 李薪蔚   

  1. ( 1 萍乡学院机械电子工程学院, 江西 萍乡 337055; 2 湖南理工职业技术学院新能源学院, 湖南 湘潭 411104 )
  • 收稿日期:2022-07-18 修回日期:2022-08-30 出版日期:2023-11-28 发布日期:2023-11-28
  • 通讯作者: E-mail: zhangxingjiao521@163.com E-mail:E-mail: zhangxingjiao521@163.com
  • 作者简介:张兴娇 (1986 - ), 女, 江西萍乡人, 硕士, 讲师, 主要从事光通信、光传感、微纳光子晶体以及光域表面等离子体理论及应用方面的研 究。E-mail: zhangxingjiao521@163.com
  • 基金资助:
    江西省科技厅项目 (20202BABL201021), 湖南省自然科学基金 (2019JJ70060), 江西省教育厅科学技术研究项目 (GJJ212714)

Design of multichannel filter based on surface plasmon polaritons

ZHANG Xingjiao 1* , ZENG Lili 2 , WEN Ruquan 1 , LIAO Jianbo 1 , LI Xinwei 1   

  1. ( 1 School of Mechanical and Electronic Engineering, Pingxiang University, Pingxiang 337055, China; 2 School of New Energy, Hunan Vocational Institute of Technology, Xiangtan 411104, China )
  • Received:2022-07-18 Revised:2022-08-30 Published:2023-11-28 Online:2023-11-28

摘要: 设计了一种由一个槽型腔和两个波导耦合构建的金属-介质-金属 (MDM) 滤波器, 并利用时域有限差分法 对该结构进行了仿真研究, 分析了主要结构参数对滤波器传输特性的影响。研究发现: 纵向位移Ld对传输特性有重 要影响, 会导致新的谐振峰出现; 在一定范围内, 槽腔宽度 Wc 的增加使得透射峰增加并且更均匀地分布在 600~ 1500 nm范围内。通过参数优化最终设计了分布于550、 730、 920、1330 nm波段窗口附近的多通道滤波器, 该设计透 射峰窄、 品质因子良好, 且结构简单、 易于集成、 制作方便, 能够很好地运用在波分复用系统及光通信中。

关键词: 光电子学, 表面等离子激元, 金属-介质-金属结构波导, 时域有限差分法, 传输特性

Abstract: A metal-dielectric-metal (MDM) filter is designed which is composed of a slot cavity and two waveguides. The influence of main structure parameters on the transmission characteristics of the filter is analyzed in detail using the finite-difference time-domain (FDTD) method. It is found that the lateral displacement Ld has a significant impact on transmission properties of the filter,which will lead to the appearance of new resonance peaks. In addition, it is shown that the increase of the cavity width Wc will not only make the number of transmission peaks increase, but also make the transmission peaks distribute more uniformly in the range from 600 nm to 1500 nm within limits. Through parameter optimization, a multi-channel filter distributed near the 550, 730, 920 and 1330 nm wavelength windows in optical communication systems is designed. The design has the advantages of narrow transmission peak, good quality factor, simple structure, easy integration and easy fabrication, which can be well used in wavelength-division multiplexing system and optical communication.

Key words: optoelectronics, surface plasmon polaritons, metal-dielectric-metal structural waveguide, finite-difference time-domain, transmission characteristics

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