Polarizability and magnetoplasmonic properties of magnetic general nanoellipsoids
Artikel i vetenskaplig tidskrift, 2013
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.
arrays
metal nanoparticles
light-scattering
enhanced fields
faraday-rotation
dynamic depolarization
optical-properties
particles
surface
nanowire
magnetooptical activity
Författare
N. Maccaferri
Nanomagnetism Group
J. B. Gonzalez-Diaz
Nanomagnetism Group
Stefano Bonetti
Stanford University
A. Berger
Nanomagnetism Group
M. Kataja
Aalto-Yliopisto
S. van Dijken
Aalto-Yliopisto
Josep Nogues
Institut Catala de Nanociencia i Nanotecnologia
Valentina Bonanni
Consiglo Nazionale Delle Richerche
Zhaleh Pirzadeh Irannezhad
Chalmers, Teknisk fysik, Bionanofotonik
Alexander Dmitriev
Chalmers, Teknisk fysik, Bionanofotonik
Johan Åkerman
Kungliga Tekniska Högskolan (KTH)
Paolo Vavassori
Nanomagnetism Group
Basque Foundation for Science (Ikerbasque)
Optics Express
1094-4087 (ISSN) 10944087 (eISSN)
Vol. 21 8 9875-9889Ämneskategorier
Atom- och molekylfysik och optik
DOI
10.1364/OE.21.009875