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5 March 2021 Localized surface plasmon resonance sensor for magnetic field detection
Mark Ciappesoni, Jieyuan Tian, Mohammad Iftekhar, Sung Jin Kim
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Proceedings Volume 11658, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVIII; 116580D (2021) https://doi.org/10.1117/12.2579258
Event: SPIE BiOS, 2021, Online Only
Abstract
We report a localized surface plasmon resonance (LSPR) sensor that consists of noble metal and ferromagnetic material. This hybrid system offers tunable LSPR frequencies by the refractive index change of the surrounding medium as well as the external magnetic field around the nanostructures. We used a gold nanoparticle with Co and Fe. The thin ferromagnetic layers coated on gold nanoparticles have a linear dependence between relative permittivity with an applied magnetic field. The underlying mechanism is the change of the dielectric constant of the ferromagnetic film when it has aligned magnetization in the same direction of the external magnetic field. Consequently, change of the LSPR absorption spectrum of the hybrid nanostructures.
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Mark Ciappesoni, Jieyuan Tian, Mohammad Iftekhar, and Sung Jin Kim "Localized surface plasmon resonance sensor for magnetic field detection", Proc. SPIE 11658, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVIII, 116580D (5 March 2021); https://doi.org/10.1117/12.2579258
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KEYWORDS
Magnetic sensors
Magnetism
Sensors
Surface plasmons
Ferromagnetics
Nanostructures
Absorption
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