Linear and nonlinear optical responses influenced by broken symmetry in an array of gold nanoparticles

An array of low-symmetry, L-shaped gold nanoparticles is shown to exhibit high sensitivity to the state of incident polarization. Small imperfections in the shape of the actual particles, including asymmetric arm lengths and edge distortions, break the symmetry attributed to an ideal particle. This...

Full description

Saved in:
Bibliographic Details
Published in:Optics express 2004-11, Vol.12 (22), p.5418-5423
Main Authors: Canfield, Brian, Kujala, Sami, Jefimovs, Konstantins, Turunen, Jari, Kauranen, Martti
Format: Article
Language:English
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An array of low-symmetry, L-shaped gold nanoparticles is shown to exhibit high sensitivity to the state of incident polarization. Small imperfections in the shape of the actual particles, including asymmetric arm lengths and edge distortions, break the symmetry attributed to an ideal particle. This broken symmetry leads to a large angular displacement of the extinction axes from their expected locations. More significantly, second-harmonic generation experiments reveal significant second-order susceptibility tensor components forbidden to the ideal symmetry.
ISSN:1094-4087
1094-4087
DOI:10.1364/opex.12.005418