DataVXChalcogenide LettersPaper
journal article·2021-09

Hydrocarbons detection using surface plasmon resonance with As2S3 thin film waveguide

National Institute R&D of Optoelectronics, INOE 2000, 409 Atomistilor str., PO BOX MG. 5, 77125 Magurele, Ilfov, Romania, L. Baschir, S. Miclos, National Institute R&D of Optoelectronics, INOE 2000, 409 Atomistilor str., PO BOX MG. 5, 77125 Magurele, Ilfov, Romania, D. Savastru, National Institute R&D of Optoelectronics, INOE 2000, 409 Atomistilor str., PO BOX MG. 5, 77125 Magurele, Ilfov, Romania, I. D. Simandan, National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania, A. A. Popescu, National Institute R&D of Optoelectronics, INOE 2000, 409 Atomistilor str., PO BOX MG. 5, 77125 Magurele, Ilfov, Romania

Chalcogenide Letters· Volume 18· Issue 9
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Source abstract

Abstract

Surface plasmon resonance containing amorphous As2S3 film is proposed as a chemical sensor to highlight several liquid hydrocarbons. Method is label-free and is based on detection of small changes in the refractive index. As2S3 operates as plasmonic waveguide which confines the probing beam to the interface with liquid hydrocarbons. The method can easily distinguish hydrocarbons with very close refractive indices. The film thicknesses were optimized to obtain the best sensitivity and resolving power. Minimum reflectance of SPR less than 1 % was found for optimal calculated film thicknesses, the sensitivity to the refractive index changes being 2·10-5 .
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Research context

OpenAlex topics: Photonic and Optical Devices · Advanced Fiber Optic Sensors · Photonic Crystals and Applications

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