Open AccessModeling and analysis of the RI sensitivity of plasmonic sensor based on MIM waveguide-coupled structure
Author(s) -
Imane Zegaar,
Abdesselam Hocini,
Hocine Ben Salah
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1859/1/012024
Subject(s) - finite difference time domain method , plasmon , sensitivity (control systems) , resonator , materials science , wavelength , metal insulator metal , optoelectronics , waveguide , optics , physics , electronic engineering , engineering , quantum mechanics , voltage , capacitor
In this paper, a plasmonic sensor is proposed based on a metal-insulator-metal waveguide coupled with a double-triangle resonator. The sensing structure is numerically and theoretically investigated using the two-dimensional finite difference time domain (FDTD) method. The results show the presence of a linear relationship between the materials refractive indices and the sensor’s wavelength resonances. The proposed structure revealed a high sensitivity value, reaching the maximum value for mode 1 S mode1 = 1374 nm/RIU, and for mode 2 S mode2 = 2365 nm/RIU. The proposed sensor can be classified as a high-performance nano-sensor that can be used to identify different materials.