Open AccessTheoretical study of hazardous carbon‐di‐oxide gas sensing using MIM structure‐based SPR sensing scheme
Author(s) -
Srivastava Akash,
Verma Alka,
Prajapati Yogendra Kumar
Publication year - 2021
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/ote2.12035
Subject(s) - materials science , surface plasmon resonance , detection limit , full width at half maximum , refractive index , wavelength , dielectric , oxide , analytical chemistry (journal) , metal insulator metal , optoelectronics , optics , chemistry , nanotechnology , nanoparticle , physics , chromatography , quantum mechanics , voltage , metallurgy , capacitor
This work mainly focussed on the sensing of the environmentally damaging gas carbon dioxide (CO 2 ) by designing a gas sensor based on a surface plasmon resonance (SPR) principle. The proposed model is based on the metal‐insulator‐metal (MIM) model which mainly relies on metal thickness, dielectric thickness, and incident light wavelength. A comparative analysis between conventional as well as MIM‐based structure is shown in this study and it is observed that by operating at 4400 nm incident light wavelength,the MIM‐based structure shows sharp resonance curve, high resolution, minimum FWHM, and extremely high FOM. By using the modified Elden's formulae, the variation in refractive index is investigated by changing the numerical values of humidity, temperature, pressure, and CO 2 content from the reference value, respectively. For each case, the sensitivity has been estimated. By using the proposed MIM‐based structure, FOM value as high as 1273.11RIU −1 ; at the end of this article, limit of detection (LOD) is calculated by varying the CO 2 gas concentration.