Enhanced Transverse Magneto-Optical Kerr Effect in Magnetoplasmonic Crystals for the Design of Highly Sensitive Plasmonic (Bio) sensing Platforms

Author(s)

Diaz-Valencia, B. F. ^{[1, 2]} ; Mejia-Salazar, J. R. ^[3] ; Oliveira, Jr., Osvaldo N. ^[3] ; Porras-Montenegro, N. ^[1] ; Albella, Pablo ^{[4, 5]}

Affiliation

^[1] Univ Valle, Dept Phys, Cali 25360 - Colombia

^[2] Ctr Bioinformat & Photon CIBioFi, Calle 13 100-00, Edificio 320 1069, Cali 25360 - Colombia

^[3] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13560970 Sao Carlos, SP - Brazil

^[4] Univ Las Palmas Gran Canaria, Univ Inst Intelligent Syst & Numer Applicat Engn, Las Palmas Gran Canaria 35017 - Spain

^[5] Imperial Coll London, Dept Phys, Blackctt Lab, London SW7 2AZ - England

• Document type: Journal article
• Source: ACS OMEGA; v. 2, n. 11, p. 7682-7685, NOV 2017.
• Web of Science Citations: 14

Abstract

We propose a highly sensitive sensor based on enhancing the transversal magneto-optical Kerr effect (TMOKE) through excitation of surface plasmon resonances in a novel and simple architecture, which consists of a metal grating on a metal magneto-optical layer. Detection of the change in the refractive index of the analyte medium is made by monitoring the angular shift of the Fano-like resonances associated with TMOKE. A higher resolution is obtained with this technique than with reflectance curves. The key aspect of the novel architecture is to achieve excitation of surface plasmon resonances mainly localized at the sensing layer, where interaction with the analyte occurs. This led to a high sensitivity, S = 190 degrees RIU-1, and high performance with a figure of merit of the order of 10(3), which can be exploited in sensors and biosensors. (AU)

• FAPESP's process: 13/14262-7 - Nanostructured films from biologically-relevant materials
• Grantee: Osvaldo Novais de Oliveira Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 16/12311-9 - Transversal magneto-optical Kerr effect for the design and development of biosensors
• Grantee: Jorge Ricardo Mejía Salazar
• Support Opportunities: Scholarships in Brazil - Post-Doctoral