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单挡板MDM波导耦合圆盘腔的Fano共振双模式特性研究

Fano Resonance Dual Mode Performance of Single Baffle Contained MDM Waveguide Coupled Disk Cavity

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摘要

基于表面等离子亚波长结构的传输特性与光子局域特性,提出了一种单挡板金属-电介质-金属(MDM)波导耦合圆盘腔结构。由圆盘腔形成的两个孤立态与金属挡板形成的较宽的连续态干涉相消,形成两种不同模式的Fano共振。结合耦合模理论分析了该结构形成Fano共振的传输特性,用有限元分析法对结构进行模拟仿真,定量分析了结构参数对折射率传感特性的影响。结果表明:优化后的结构在两种模式下的优质因子分别为1.7×105和1.36×105,折射率灵敏度分别为710 nm/RIU和1105 nm/RIU,可为解决传感器在折射率测量时的交叉敏感问题提供理论参考。

Abstract

We propose a single baffle metal-dielectric-metal (MDM) waveguide coupled disk cavity structure based on the transmission characteristics and photon local characteristics of the surface plasmonic sub-wavelength structures. Two discrete states are provided by the disk cavity, and a metal baffle is used to produce a continuous state. The discrete states coupled with the continuous state lead to two different modes of Fano resonance. Then, the transmission characteristics of the Fano resonance are analyzed with the coupled mode theory, and the finite element analysis is used to simulate. Moreover, the effects of the structural parameters on the refractive index sensing characteristics are quantitatively analyzed. The results show that, at the first mode, the figure of merit (FOM) and the refractive index sensitivity of the optimized structure can reach to 1.7×105 and 710 nm/RIU, respectively. For the second mode, they can reach to 1.36×105 and 1105 nm/RIU, respectively. The structure can provide a theoretical reference for solving the problem of cross-sensitivity of the sensor in refractive index measurement.

Newport宣传-MKS新实验室计划
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中图分类号:O436

DOI:10.3788/aos201838.1024002

所属栏目:表面光学

基金项目:国家自然科学基金(61201112,61475133)、河北省自然科学基金(F2016203188,F2016203245)、河北省普通高校学校青年拔尖人才计划(BJ2014056)

收稿日期:2018-04-11

修改稿日期:2018-05-07

网络出版日期:2018-05-12

作者单位    点击查看

韩帅涛:燕山大学电气工程学院测试计量技术与仪器河北省重点实验室, 河北 秦皇岛 066004
陈颖:燕山大学电气工程学院测试计量技术与仪器河北省重点实验室, 河北 秦皇岛 066004
邸远见:燕山大学电气工程学院测试计量技术与仪器河北省重点实验室, 河北 秦皇岛 066004
何磊:燕山大学电气工程学院测试计量技术与仪器河北省重点实验室, 河北 秦皇岛 066004
崔行宁:燕山大学电气工程学院测试计量技术与仪器河北省重点实验室, 河北 秦皇岛 066004
朱奇光:燕山大学信息科学与工程学院河北省特种光纤与光纤传感器重点实验室, 河北 秦皇岛 066004
李少华:河北先河环保科技股份有限公司, 河北 石家庄 050000

联系人作者:陈颖(chenying@ysu.edu.cn); 韩帅涛(2350035697@qq.com);

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引用该论文

Han Shuaitao,Chen Ying,Di Yuanjian,He Lei,Cui Xingning,Zhu Qiguang,Li Shaohua. Fano Resonance Dual Mode Performance of Single Baffle Contained MDM Waveguide Coupled Disk Cavity[J]. Acta Optica Sinica, 2018, 38(10): 1024002

韩帅涛,陈颖,邸远见,何磊,崔行宁,朱奇光,李少华. 单挡板MDM波导耦合圆盘腔的Fano共振双模式特性研究[J]. 光学学报, 2018, 38(10): 1024002

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