Next Article in Journal
Determining Vortex-Beam Superpositions by Shear Interferometry
Next Article in Special Issue
Quantification of Cardiomyocyte Beating Frequency Using Fourier Transform Analysis
Previous Article in Journal
Light–Matter Interaction of Single Quantum Emitters with Dielectric Nanostructures
Article Menu

Export Article

Open AccessArticle
Photonics 2018, 5(3), 15;

Improved Magneto-Optic Surface Plasmon Resonance Biosensors

Department of Electrical Engineering & Computer Science, York University, Toronto, ON M3J 1P3, Canada
Department of Physics and Astronomy, York University, Toronto, ON M3J 1P3, Canada
GEM Systems Inc., Markham, ON L3R 5H6, Canada
Author to whom correspondence should be addressed.
Received: 11 April 2018 / Revised: 10 June 2018 / Accepted: 20 June 2018 / Published: 22 June 2018
(This article belongs to the Special Issue Biomedical Photonics Advances)
Full-Text   |   PDF [8148 KB, uploaded 22 June 2018]   |  


The magneto-optic (MO) characteristics and sensing performance of noble metal (Ag, Au, Cu) or transition metal (Fe, Ni, Co) single layers and Ag/Co or Au/Co bilayers have been studied and compared in both the standard plasmonic and MO plasmonic configurations at two different wavelengths (632.8 nm and 785 nm) and in two different sensing media (air and water). The sensing performance is found to be medium-specific and lower in biosensor-relevant water-based media. The sensitivities of MO-SPR sensors is found to be superior to SPR sensors in all cases. This enhancement in sensitivity means the detection limit of this class of transducers can be substantially improved by tuning Au/Co layer thickness, wavelength, and incident angle of optical radiation. The optimized bilayer showed an enhancement in sensitivity by over 30× in air and 9× in water as compared to the conventional Au SPR configuration. Notably, the best performance is 3× above that of MO-SPR sensors coupled to a photonic crystal previously reported in the literature and is found when the ferromagnetic layer is furthest from the sensing medium, as opposed to typical MO-SPR configurations. This proposed structure is attractive for next-generation biosensors. View Full-Text
Keywords: surface plasmon resonance; magneto-optic surface plasmon resonance; biosensors surface plasmon resonance; magneto-optic surface plasmon resonance; biosensors

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Rizal, C.; Pisana, S.; Hrvoic, I. Improved Magneto-Optic Surface Plasmon Resonance Biosensors. Photonics 2018, 5, 15.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Photonics EISSN 2304-6732 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top