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Enhanced magneto-optical effect in magnetoplasmonic ring-split ring structures

AuthorsFeng, Hua Yu; Feng, Luo; Arenal, Raul; García-Pérez, Fernando ; Armelles Reig, Gaspar ; Cebollada, Alfonso
Issue Date25-Jul-2016
Citation7th META (2016)
AbstractLarge enhancements of the magneto-optical (MO) activity by the localized surface plasmon resonance (LSPR) have been reported in structures like nanodisks, core-shell nanoparticles, dimers, etc. In this contribution, we extend this application to the magnetoplasmonic split ring-ring structure. With the hole-mask colloidal lithography method, a split Au ring is generated on top of a Au ring in which a Co-dot has been embedded. By properly optimizing the gap angle of the split ring, the electromagnetic field is redistributed and focused in the MO active Co area, therefore the MO activity obtains a boost and is maximized for the structure with a gap of 60deg angle, exhibiting an enhancement factor of 3 compared to the one without gap. The EM field redistribution and focus around the gap area is confirmed via EELS-TEM mapping
DescriptionTrabajo presentado en el 7th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2016), celebrado en Torremolinos (Málaga, España), del 25 al 28 de julio de 2016
Appears in Collections:(IMN-CNM) Comunicaciones congresos
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