Improving The Sensitivity Of The Plasmon Based Sensor By Asymmetric Nanoarray

Type Article
Date 2022-04
Language English
Author(s) Bouali AymenORCID1, Dridi Montacer2, Colas FlorentORCID2, Compère ChantalORCID3
Affiliation(s) 1 : University of Carthage , Faculty of Sciences of Bizerte: Universite de Carthage Faculte des Sciences de Bizerte, Tunisie
2 : RDT LCM Ifremer, 1625 Route de Sainte-Anne, 29280 Plouzané, Brest, France
3 : Direction Scientifque Ifremer, 1625 Route de Sainte-Anne, 29280 Plouzané, Brest, France
Source Plasmonics (1557-1955) (Springer), 2022-04 , Vol. 17 , N. 2 , P. 525-531
DOI 10.1007/s11468-021-01542-2
WOS© Times Cited 2
Keyword(s) Biosensors, Nanoparticles, Optical sensors, Plasmons, Resonance

In this work we investigate the effect of the symmetry in a 2-D arrays of gold nanoparticle on the sensitivity to the refractive index change. We demonstrate a generalized result that an asymmetric periodic arrangement of metallic nanoparticle leads to a higher sensitivity than a regular square of nanoparticle. Further decreasing the symmetry of the system by using asymmetric nanoparticle (nanorods, triangle) rather than symmetric nanoparticle (nanocylinder) will further improve this sensitivity. Finally, we suggest that such asymmetric nanostructure could operate as a SERS and LSPR plasmon based sensor by changing the polarization of the incident light.

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