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Hybrid magnetoplasmonic crystals boost the performance of nanohole arrays as plasmonic sensors

AuthorsCaballero García, Blanca ; García-Martín, Antonio ; Cuevas, J. C.
KeywordsMagnetoplasmonic crystals
Nanohole arrays
Plasmonic sensors
Transverse magneto-optical Kerr effect
Issue Date19-Jan-2016
PublisherAmerican Chemical Society
CitationACS photonics 3(2): 203–208 (2016)
AbstractWe 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.
Publisher version (URL)http://dx.doi.org/10.1021/acsphotonics.5b00658
Appears in Collections:(IMN-CNM) Artículos
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