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.

light-scattering

nanowire

arrays

particles

magnetooptical activity

dynamic depolarization

metal nanoparticles

faraday-rotation

optical-properties

surface

enhanced fields

Författare

N. Maccaferri

Nanomagnetism Group

J. B. Gonzalez-Diaz

Nanomagnetism Group

Stefano Bonetti

Stanford Linear Accelerator Center

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

Nanomagnetism Group

Ikerbasque, the Basque Foundation for Science

Optics Express

1094-4087 (ISSN)

Vol. 21 9875-9889

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1364/OE.21.009875