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.

faraday-rotation

arrays

nanowire

particles

enhanced fields

light-scattering

dynamic depolarization

metal nanoparticles

magnetooptical activity

surface

optical-properties

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

Consiglio Nazionale delle Ricerche

Zhaleh Pirzadeh Irannezhad

Chalmers, Teknisk fysik, Bionanofotonik

Alexander Dmitriev

Chalmers, Teknisk fysik, Bionanofotonik

Johan Åkerman

Kungliga Tekniska Högskolan (KTH)

Paolo Vavassori

Basque Foundation for Science (Ikerbasque)

Nanomagnetism Group

Optics Express

1094-4087 (ISSN)

Vol. 21 8 9875-9889

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1364/OE.21.009875