Refractive index sensor based on multiple Fano resonances in a plasmonic MIM structure

Li Zhengfeng; Wen Kunhua; Chen Li; Lei Lang; Zhou Jinyun; Zhou Dongyue; Fang Yihong; Wu Bingye

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Refractive index sensor based on multiple Fano resonances in a plasmonic MIM structure

机译：基于多种FANO共振的折射率传感器在等离子体MIM结构中

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A chip-scale refractive index sensor based on multiple Fano resonances is proposed by using a metal-insulator-metal (MIM) structure, which is constructed by two side-coupled semi-ring cavities and a vertical cavity. The finite-difference time-domain method and multimode interference coupled-mode theory are employed to simulate and analyze the transmission spectra of this structure, respectively. First, dual Fano resonances are generated in the MIM structure with a baffle and a semi-ring cavity. By arranging two additional cavities, the mode interferences successfully induce up to six ultra-sharp and asymmetrical Fano peaks. The calculated sensing performances are available with ultra-high sensitivity of 1405 nm/RIU and figure of merit of 3.62 x 10(5). This chip-scale refractive index sensor may have great applications in highly integrated photonic circuits. (C) 2019 Optical Society of America

机译：通过使用金属 - 绝缘体 - 金属（MIM）结构提出了一种基于多个FANO谐振的芯片尺度折射率传感器，其由两个侧耦合的半环空腔和垂直腔构造。有限差分时域方法和多模干扰耦合模式理论分别模拟和分析该结构的透射光谱。首先，在具有挡板和半环腔的MIM结构中产生双扇形谐振。通过布置两个额外的空腔，模式干扰成功地诱导了多达六个超锋利和不对称的Fano峰。计算的传感性能可提供1405 nm / Riu的超高灵敏度和3.62 x 10（5）的优点。该芯片尺度折射率传感器可具有很大的应用在高度集成的光子电路中。（c）2019年光学学会

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来源
《Applied optics》 |2019年第18期|共6页
作者
Li Zhengfeng; Wen Kunhua; Chen Li; Lei Lang; Zhou Jinyun; Zhou Dongyue; Fang Yihong; Wu Bingye;
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Guangdong Univ Technol Sch Phys &

Optoelect Engn Guangzhou 510006 Guangdong Peoples R China;

Guangdong Univ Technol Sch Phys &

Optoelect Engn Guangzhou 510006 Guangdong Peoples R China;

Guangdong Univ Technol Sch Phys &

Optoelect Engn Guangzhou 510006 Guangdong Peoples R China;

Guangdong Univ Technol Sch Phys &

Optoelect Engn Guangzhou 510006 Guangdong Peoples R China;

Guangdong Univ Technol Sch Phys &

Optoelect Engn Guangzhou 510006 Guangdong Peoples R China;

Guangdong Univ Technol Sch Phys &

Optoelect Engn Guangzhou 510006 Guangdong Peoples R China;

Guangdong Univ Technol Sch Phys &

Optoelect Engn Guangzhou 510006 Guangdong Peoples R China;

Guangdong Univ Technol Sch Phys &

Optoelect Engn Guangzhou 510006 Guangdong Peoples R China;

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Refractive index sensor based on multiple Fano resonances in a plasmonic MIM structure

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