Surface plasmon polaritons enhanced magnetic plasmon resonance for high-quality sensing. (1st December 2022)

• Record Type: Journal Article
• Authors: Chen, Jing; Cheng, Lu; Zhao, Lianjie; Gu, Ping; Yan, Zhendong; Tang, Chaojun; Gao, Fan; Zhu, Mingwei
• Is Part Of: Applied physics express. Volume 15:Number 12(2022)
• Publication Date: 2022-12-01
• Subjects: split-ring resonators -- surface plasmon polaritons -- magnetic plasmon resonance -- metamaterial sensor; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.35848/1882-0786/aca316
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: We investigate the metamaterials consisting of top layer U-shaped metallic split-ring resonators, the middle thin dielectric layer, and the bottom thick metal film, which can realize high-quality refractive index sensing. When propagating surface plasmon polaritons are introduced, two ultra-narrow-band hybridized modes will appear, whose full width at half maximum can reach up to 2.5 nm. Because of the ultra-narrow linewidth and huge magnetic field enhancement at hybridized modes, the metamaterials display very high sensitivity ( S = 912 nm RIU −1, S * = 95.64 RIU −1 ) and large figure of merit (FOM = 364.8, FOM*= 160 740.34), which has great potential in label-free biomedical sensing.