Hybrid Magnetoplasmonic Crystals Boost the Performance of Nanohole Arrays as Plasmonic Sensors

We present here a theoretical study that shows how the use of hybrid magnetoplasmonic crystals comprising both ferromagnetic and noble metals leads to a large enhancement of the performance of nanohole arrays as plasmonic sensors. In particular, we propose using Au–Co–Au films perforated with a peri...

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Bibliographic Details
Published inACS photonics Vol. 3; no. 2; pp. 203 - 208
Main Authors Caballero, Blanca, García-Martín, Antonio, Cuevas, Juan Carlos
Format Journal Article
LanguageEnglish
Published American Chemical Society 17.02.2016
Subjects
transverse magneto-optical Kerr effect
nanohole arrays
magnetoplasmonic crystals
plasmonic sensors
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Summary:We present here a theoretical study that shows how the use of hybrid magnetoplasmonic crystals comprising both ferromagnetic and noble metals leads to a large enhancement of the performance of nanohole arrays as plasmonic sensors. In particular, we propose using Au–Co–Au films perforated with a periodic array of subwavelength holes as transducers in magneto-optical surface-plasmon-resonance sensors, where the sensing principle is based on measurements of the transverse magneto-optical Kerr effect. We demonstrate that this detection scheme may result in bulk figures of merit that are 2 orders of magnitude larger than those of any other type of plasmonic sensor. The sensing strategy put forward here can make use of the different advantages of nanohole-based plasmonic sensors such as miniaturization, multiplexing, and its combination with microfluidics.
ISSN:2330-4022
2330-4022
DOI:10.1021/acsphotonics.5b00658