Plasmonic Refractive Index Sensor with High Figure of Merit Based on Concentric-Rings Resonator

Zhaojian Zhang; Junbo Yang; Xin He; Jingjing Zhang; Jie Huang; Dingbo Chen; Yunxin Han

doi:10.20944/preprints201711.0088.v2

Submitted:

19 December 2017

Posted:

20 December 2017

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This version is not peer-reviewed.

Plasmonic Refractive Index Sensor with High Figure of Merit Based on Concentric-Rings Resonator

Zhaojian Zhang

,Junbo Yang^*,Xin He,Jingjing Zhang,Jie Huang,Dingbo Chen,Yunxin Han

Zhaojian Zhang

,Junbo Yang^*,Xin He,Jingjing Zhang,Jie Huang,Dingbo Chen,Yunxin Han

A peer-reviewed article of this preprint also exists.

Submitted:

19 December 2017

Posted:

20 December 2017

You are already at the latest version

Abstract

A plasmonic refractive index (RI) sensor based on metal-insulator-metal (MIM) waveguide coupled with concentric double rings resonator (CDRR) is proposed and investigated numerically. Utilizing the novel supermodes of the CDRR, the FWHM of the resonant wavelength can be modulated, and a sensitivity of 1060 nm/RIU with high figure of merit (FOM) 203.8 is realized in the near-infrared region. The unordinary modes as well as the influence of structure parameters on the sensing performance are also discussed. Such plasmonic sensor with simple framework and high optical resolution could be applied to on-chip sensing systems and integrated optical circuits. Besides, the special cases of bio- sensing and triple rings are also discussed.

Keywords:

plasmonic sensor

;

high figure of merit

;

concentric double rings resonator

Subject:

Physical Sciences - Optics and Photonics

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