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Synthesis of Immunotargeted Magneto-plasmonic Nanoclusters
Published on: August 22, 2014
Polarizability and magnetoplasmonic properties of magnetic general nanoellipsoids
Nicolò Maccaferri1, Juan B González-Díaz, Stefano Bonetti
1Nanomagnetism Group, CIC nanoGUNE Consolider, 20018 Donostia-San Sebastián, Spain. n.maccaferri@nanogune.eu
Abstract:
An approach to compute the polarizability tensor of magnetic nanoparticles having general ellipsoidal shape is presented. We find a surprisingly excellent quantitative agreement between calculated and experimental magneto-optical spectra measured in the polar Kerr configuration from nickel nanodisks of large size (exceeding 100 nm) with circular and elliptical shape. In spite of its approximations and simplicity, the formalism presented here captures the essential physics of the interplay between magneto-optical activity and the plasmonic resonance of the individual particle. The results highlight the key role of the dynamic depolarization effects to account for the magneto-optical properties of plasmonic nanostructures.
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