| 基于耦合T型空腔的多重法诺共振现象 |
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| 引用本文： | 安厚霖,张冠茂,胡南,石悦,王志爽.基于耦合T型空腔的多重法诺共振现象[J].光子学报,2016(11):106-111. |
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| 作者姓名： | 安厚霖 张冠茂 胡南 石悦 王志爽 |
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| 作者单位： | 兰州大学信息科学与工程学院现代通信技术研究所,兰州,730000 |
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| 基金项目： | 中央高校基本科研业务费专项资金(兰州大学)(lzujbky-2015-K7)，The Fundamental Research Funds For the Central Universities(Lanzhou University)(lzujbky-2015-K7) |
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| 摘 要： | 提出由T型空腔和挡板组成的两种金属-电介质-金属(MIM)波导结构,分别为:正T型空腔结构和倒T型空腔结构,并应用有限元法系统地研究了该结构的透射特性.对于正T型空腔结构,仿真结果出现了双重法诺共振现象,并且共振波长可以通过改变T型空腔长度和高度进行调节.该结构有助于设计成敏感度达到1 620nm/RIU、品质因数为5.4×10~4的纳米传感器.对于倒置T型空腔,在波导中产生了多重法诺共振现象,其敏感度可达1 560nm/RIU,品质因数为9.37×104.该结构有望在光学集成回路,特别是纳米传感器、光束分路器方面具有广泛应用.
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| 关 键 词： | 波导 表面等离子激元 法诺共振 T型谐振腔 传输谱 品质因数 光学传感与传感器 |
Phenomenon of Multiple Fano Resonances Based on Coupled T-type Cavity |
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| Abstract: | Two Metal-Insulator-Metal (MIM) waveguide structures that consists of T-type cavity and baffle were proposed,and they are the positive T-type cavity structure and the inverted T-type cavity structure respectively.The transmission characteristics of this structure were calculated by using the Finite-Element Method(FEM).The simulation results show the double Fano resonances for the positive T-type cavity structure,and the resonant wavelength can be easily tuned by changing the length and the height of the T-type cavity.The structure would be helpful for designing the nano-sensor with a sensitivity of 1620 nm/RIU and the figure of merit of 5.4 × 104.By inverting the T-type cavity,multiple Fano resonances are observed in the waveguide with a sensitivity of 1560 nm/RIU and the figure of merit of 9.37 × 104.The waveguide structure may have wide applications in highly integrated optical circuits,especially for nano-sensor and spectral splitter. |
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| Keywords: | Waveguide Surface plasmon polariton Fano resonance T-type resonator Transmission spectrum Figure of merit Optical sensing and sensors |
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