Journal
CURRENT APPLIED PHYSICS
Volume 20, Issue 11, Pages 1274-1280Publisher
ELSEVIER
DOI: 10.1016/j.cap.2020.08.020
Keywords
Metal-insulator-metal waveguide; Surface plasmon polaritons; Refractive index sensor; Plasmonics; Finite element method
Funding
- Russian Foundation for Basic Research [16-29-09528_ofi_m]
- Ministry of Science and Higher Education within the State assignment FSRC Crystallography and Photonics RAS [007GZ/Ch3363/26]
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Herein, a highly integrated plasmonic sensor based on a multichannel metal-insulator-metal waveguide scheme for the simultaneous detection of multiple analytes is proposed. The numerical study is conducted via the finite element method based on commercially available software COMSOL. The sensor design is highly sensitive which can detect a minute change in the refractive index of the analyte. In this study, we have used the refractive index values of three different concentrations of ethanol and D-glucose solution to determine the sensor performance. It is observed that the device is highly sensitive as the operational wavelength lies in the deep shortwave infrared region. The numerically calculated sensitivity as high as 1948.67 nm/RIU is obtained for the cavity length of 325 nm which can be further improved by designing the device with large cavities. We believe that the proposed study is beneficial for the realization of the highly integrated plasmonic sensors for the lab-on-chip operations.
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