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A High Performance Plasmonic Sensor Based on Metal-Insulator-Metal Waveguide Coupled with a Double-Cavity Structure

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Abstract

A high performance plasmonic sensor based on a metal-insulator-metal (MIM) waveguide coupled with a double-cavity structure consisting of a side-coupled rectangular cavity and a disk cavity is proposed. The transmission characteristics of the rectangular cavity and disk cavity are analyzed theoretically and the improvements of performance for the double-cavity structure compared with a single cavity are studied. The influence of structural parameters on the transmission spectra and sensing performance are investigated in detail. A sensitivity of 1136 nm/RIU with a high figure of merit of 51,275 can be achieved at the resonant wavelength of 1148.5 nm. Due to the high performance and easy fabrication, the proposed structure may be applied in integrated optical circuits and on-chip nanosensors.

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Acknowledgments

This work is supported by the National Projects of Key Scientific Instruments No. 2012YQ16000702 in China.

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Authors and Affiliations

  1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China

    Shiwen Luo, Bin Li, Dongsheng Xiong, Duluo Zuo & Xinbing Wang

Authors
  1. Shiwen Luo
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  2. Bin Li
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  3. Dongsheng Xiong
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  4. Duluo Zuo
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  5. Xinbing Wang
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Correspondence to Duluo Zuo.

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Luo, S., Li, B., Xiong, D. et al. A High Performance Plasmonic Sensor Based on Metal-Insulator-Metal Waveguide Coupled with a Double-Cavity Structure. Plasmonics 12, 223–227 (2017). https://doi.org/10.1007/s11468-016-0253-y

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  • DOI: https://doi.org/10.1007/s11468-016-0253-y

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