光子学报 ›› 2020, Vol. 49 ›› Issue (2): 223001-0223001.doi: 10.3788/gzxb20204902.0223001

• 光学器件 • 上一篇    下一篇

一种基于矩形腔的MIM波导滤波器的滤波特性研究

龙虎1,2, 陈红艺1, 陆小微1, 蔡懿1, 曾选科1, 李景镇1   

  1. 1. 深圳大学 电子科学与技术学院 深圳市微纳光子信息技术重点实验室, 广东 深圳 518060;
    2. 深圳大学 光电工程学院 光电子器件与系统(教育部/广东省)重点实验室, 广东 深圳 518060
  • 收稿日期:2019-09-15 出版日期:2020-02-25 发布日期:2020-02-29
  • 通讯作者: LI Jing-zhen (1940-),male,professor,M.S.degree,mainly focuses on high-speed photography and transient optical imaging.Email:lijz@szu.edu.cn
  • 作者简介:LONG Hu (1986-),male,postdoctor,Ph.D.degree,mainly focuses on SPP waveguide devices,fiber laser and amplifier technology.Email:lhu@szu.edu.cn
  • 基金资助:
    The National Major Scientific Instruments and Equipments Development Project of National Natural Science Foundation of China (No. 61827815)

Filtering Characteristics of an MIM Waveguide Filter Based on a Rectangular Cavity

LONG Hu1,2, CHEN Hong-yi1, LU Xiao-wei1, CAI Yi1, ZENG Xuan-ke1, LI Jing-zhen1   

  1. 1. Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, College of Electronic Science and Technology, Shenzhen University, Shenzhen, Guangdong 518060, China;
    2. Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
  • Received:2019-09-15 Online:2020-02-25 Published:2020-02-29
  • Supported by:
    The National Major Scientific Instruments and Equipments Development Project of National Natural Science Foundation of China (No. 61827815)

摘要: 理论提出并研究了一种基于矩形腔的窄带金属-介质-金属波导滤波器.建立滤波器内电场的传递矩阵模型,研究了矩形微腔与直通波导间耦合特性对器件滤波特性的影响.同时,研究了耦合长度、矩形微腔腔长、传输损耗等因素对滤波带宽的影响.研究结果表明,对于不同的矩形微腔腔长,存在一个可使器件滤波带宽达到最窄的耦合系数.此外,当微腔腔长越长且传输损耗越小时,滤波带宽也将越窄.该研究为表面等离子体波导的研究与设计提供了一定的参考.

关键词: 表面等离子体, 金属-介质-金属, 波导滤波器, 微腔, 传递矩阵

Abstract: A narrow-band Metal-Insulator-Metal (MIM) waveguide filter based on a rectangular cavity is proposed and investigated in theory. The influences of the coupling characteristics between the microcavity and the waveguide on the filtering characteristics, which have not been clearly demonstrated before, are studied by establishing a transfer matrix theoretical model for the transmission of electric fields in the filter. The effects of coupling length, rectangular cavity length, and propagation loss on the filtering bandwidth are also analyzed. It is found that for different resonance cavity lengths, there is an optimal coupling coefficient at which the filtering bandwidth is the narrowest. In addition, the greater the resonance cavity length and the lower the cavity loss, the narrower the filter bandwidth. These would provide some reference for the research and development of surface plasmon polariton filters.

Key words: Surface plasmon polarition, Metal-insulator-metal, Waveguide filter, Microcavity, Transfer matrix

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