Multimode Optical Filter Based on Waveguide Side-Coupled Ring Resonator; [基于环形谐振器边耦合波导的多模光学滤波器]

被引：0

作者：

Liu Z. ^{[1
,2
]}

Zhang Z. ^{[1
]}

Zhang X. ^{[1
]}

Gao E. ^{[1
]}

Zhou F. ^{[1
]}

Wang J. ^{[1
]}

Wang Y. ^{[1
]}

机构：

[1] School of Science, East China Jiaotong University, Nanchang, 330013, Jiangxi

[2] Department of Materials Science and Engineering, The Ohio State University, Columbus, 43210, OH

来源：

Guangxue Xuebao/Acta Optica Sinica | 2020年 / 40卷 / 11期

关键词：

Fano resonance; MDM waveguide; Multimode optical filter; Optical devices; Resonator; Surface plasmonics;

D O I：

10.3788/AOS202040.1123001

中图分类号：

学科分类号：

摘要：

In this study, we design a metal-dielectric-metal (MDM) waveguide side-coupled square ring resonator with a rectangular-groove (RG). Its effective length is accurately derived through the F-P theory and a tunable multimode plasmonic filter is realized based on this structure. Based on numerical calculations and theoretical analysis, the extra non-integer resonant modes are obtained beyond the conventional integer modes. The wavelength of each non-integer resonant mode red-shifts with the increase of the RG's length because RG has the maximal effect on the magnetic field when it is located at antinodes of the magnetic fields. However, the integer modes are not sensitive to RG and their wavelengths are fixed because RG has the minimal effect on the magnetic field when it is placed on the nodes of the magnetic fields. The number of modes and their field distributions can be adjusted by changing the shape, position, and number of RGs. Compared with the conventional resonators, the proposed structure and the corresponding results are extremely useful for the design of optoelectronic devices as they can provide more channels to flexibly manipulate the resonant wavelengths. © 2020, Chinese Lasers Press. All right reserved.

引用

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