The University of Southampton
University of Southampton Institutional Repository

Polarizabilities of complex individual dielectric or plasmonic nanostructures

Polarizabilities of complex individual dielectric or plasmonic nanostructures
Polarizabilities of complex individual dielectric or plasmonic nanostructures
When the sizes of photonic nanoparticles are much smaller than the excitation wavelength, their optical response can be efficiently described with a series of polarizability tensors. Here, we propose a universal method to extract the different components of the response tensors associated with small plasmonic or dielectric particles. We demonstrate that the optical response can be faithfully approximated, as long as the effective dipole is not induced by retardation effects, hence do not depend on the phase of the illumination. We show that the conventional approximation breaks down for a phase-driven dipolar response, such as optical magnetic resonances in dielectric nanostructures. To describe such retardation induced dipole resonances in intermediate-size dielectric nanostructures, we introduce "pseudo-polarizabilities" including first-order phase effects, which we demonstrate at the example of magnetic dipole resonances in dielectric spheres and ellipsoids. Our method paves the way for fast simulations of large and inhomogeneous meta-surfaces.
1550-235X
Patoux, Adelin
23ce5571-664b-435e-a61f-59f3327211d2
Majorel, Clément
9675de01-802c-46c0-a148-120ebc8eb08f
Wiecha, Peter
fb335482-9577-41af-a0ef-3988b7654c9b
Cuche, Aurélien
b73df224-dec7-4bbd-843e-166b0dcbb3a8
Muskens, Otto
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Girard, Christian
208998d8-df24-4aca-bf5b-8eb67e16ab5a
Arbouet, Arnaud
1015aa0b-ecff-4ec3-9fe0-c1558e9127fb
Patoux, Adelin
23ce5571-664b-435e-a61f-59f3327211d2
Majorel, Clément
9675de01-802c-46c0-a148-120ebc8eb08f
Wiecha, Peter
fb335482-9577-41af-a0ef-3988b7654c9b
Cuche, Aurélien
b73df224-dec7-4bbd-843e-166b0dcbb3a8
Muskens, Otto
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Girard, Christian
208998d8-df24-4aca-bf5b-8eb67e16ab5a
Arbouet, Arnaud
1015aa0b-ecff-4ec3-9fe0-c1558e9127fb

Patoux, Adelin, Majorel, Clément, Wiecha, Peter, Cuche, Aurélien, Muskens, Otto, Girard, Christian and Arbouet, Arnaud (2020) Polarizabilities of complex individual dielectric or plasmonic nanostructures. Physical Review B, 101 (23), [235418]. (doi:10.1103/PhysRevB.101.235418).

Record type: Article

Abstract

When the sizes of photonic nanoparticles are much smaller than the excitation wavelength, their optical response can be efficiently described with a series of polarizability tensors. Here, we propose a universal method to extract the different components of the response tensors associated with small plasmonic or dielectric particles. We demonstrate that the optical response can be faithfully approximated, as long as the effective dipole is not induced by retardation effects, hence do not depend on the phase of the illumination. We show that the conventional approximation breaks down for a phase-driven dipolar response, such as optical magnetic resonances in dielectric nanostructures. To describe such retardation induced dipole resonances in intermediate-size dielectric nanostructures, we introduce "pseudo-polarizabilities" including first-order phase effects, which we demonstrate at the example of magnetic dipole resonances in dielectric spheres and ellipsoids. Our method paves the way for fast simulations of large and inhomogeneous meta-surfaces.

Text
extrac-pola-plasmonic_accepted_version - Accepted Manuscript
Available under License Other.
Download (2MB)
Text
PhysRevB.101.235418 - Version of Record
Available under License Other.
Download (2MB)

More information

Submitted date: 9 December 2019
Accepted/In Press date: 25 March 2020
e-pub ahead of print date: 8 June 2020

Identifiers

Local EPrints ID: 436576
URI: http://eprints.soton.ac.uk/id/eprint/436576
ISSN: 1550-235X
PURE UUID: 1fd06287-27b6-4408-9552-89147eaf8488
ORCID for Otto Muskens: ORCID iD orcid.org/0000-0003-0693-5504

Catalogue record

Date deposited: 03 Jul 2020 16:31
Last modified: 18 Feb 2021 17:13

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×