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Far- and near-field broad-band magneto-optical functionalities using magnetoplasmonic nanorods

AuthorsArmelles Reig, Gaspar ; Cebollada, Alfonso ; García-Pérez, Fernando ; García-Martín, Antonio ; Sousa N. da
KeywordsActive nanoantennas
Polarization conversion
Issue Date10-Nov-2016
PublisherAmerican Chemical Society
CitationACS photonics 3(12): 2427–2433 (2016)
AbstractWe have performed a systematic study of magnetoplasmonic Au/Co/Au nanorods with different long/short axes ratio arranged in a disordered fashion but with the same spatial orientation of their axes. We show that the magneto-optical response can be tuned from the visible to the near-infrared range by changing the long/short axes ratio. Moreover, the analysis of the magnetic field induced polarization conversion indicates a different behavior for the far field and for the near field. In particular, the far-field polarization conversion of the nanorod does not depend on the incident polarization, whereas the near field does. This anticipates direct consequences for near-field interactions, since the interacting elements at different spatial positions could give rise to different magneto-optical responses.
Publisher version (URL)http://dx.doi.org/10.1021/acsphotonics.6b00670
Appears in Collections:(IMN-CNM) Artículos
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