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基于非对称圆形谐振腔金属-介质-金属波导结构的带阻滤波器

Band-Stop Filter Based on Metal-Insulator-Metal Waveguide with Asymmetric Circular Resonant Cavities

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摘要

提出一种金属-介质-金属非对称圆形结构, 该结构由两个圆形谐振腔、一个传输波导和两个耦合波导组成。利用谐振腔的局域作用加强表面等离激元的耦合作用, 获得较大的透射率。采用有限时域差分方法研究了圆形谐振腔半径、个数和两圆腔中心距离对强透射特性的影响。结果表明, 当非对称圆形谐振腔的半径为100 nm、两圆间距为200 nm时, 该结构具有较高的透射率。通过优化主要参数, 所设计结构的平均阻带宽度为1000 nm, 工作范围可增大到2500 nm。

Abstract

Herein, a metal-insulator-metal asymmetric circular structure comprising two circular cavities, a transmission waveguide, and two coupled waveguides is proposed. The coupling effect of surface plasmon polaritons is strengthened through the local effect of resonant cavities, and a good extraordinary transmission is obtained. The effects of the radii and number of circular resonant cavities and that of the inter-circle distance on such an extraordinary transmission are investigated via the finite difference time domain method. The results show that in the case that the radius of the circular resonant cavity resonator and the inter-circle distance are 100 nm and 200 nm, respectively, the structure exhibits a very good extraordinary transmission. The optimization of these main parameters could allow an average stopband width of 1000 nm and increase the working range up to 2500 nm.

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中图分类号:TN256

DOI:10.3788/aos201939.0513001

所属栏目:集成光学

基金项目:国家自然科学基金(61465004, 61765004)、广西自然科学基金(2017GXNSFAA198164,2016GXNSFAA380006)、桂林电子科技大学研究生教育创新计划(2017YJCX41, 2019YCXS028)、广西精密导航技术与应用重点实验室(DH201804,DH201703)

收稿日期:2018-11-17

修改稿日期:2019-01-02

网络出版日期:2019-01-21

作者单位    点击查看

肖功利:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
窦婉滢:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
杨宏艳:桂林电子科技大学电子工程与自动化学院, 广西 桂林 541004
韦清臣:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
徐俊林:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
杨秀华:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
张开富:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
杨寓婷:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
李海鸥:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
傅涛:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
张法碧:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004
孙堂友:桂林电子科技大学广西精密导航技术与应用重点实验室, 广西 桂林 541004

联系人作者:肖功利(xgl.hy@126.com)

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引用该论文

Xiao Gongli,Dou Wanying,Yang Hongyan,Wei Qingchen,Xu Junlin,Yang Xiuhua,Zhang Kaifu,Yang Yuting,Li Haiou,Fu Tao,Zhang Fabi,Sun Tangyou. Band-Stop Filter Based on Metal-Insulator-Metal Waveguide with Asymmetric Circular Resonant Cavities[J]. Acta Optica Sinica, 2019, 39(5): 0513001

肖功利,窦婉滢,杨宏艳,韦清臣,徐俊林,杨秀华,张开富,杨寓婷,李海鸥,傅涛,张法碧,孙堂友. 基于非对称圆形谐振腔金属-介质-金属波导结构的带阻滤波器[J]. 光学学报, 2019, 39(5): 0513001

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