Issue 7, 2015

Nonlinear optical enhancement caused by a higher order multipole mode of metallic triangles

Abstract

We describe a nonlinear optical study of gold triangles that exploits a higher order plasmonic resonance. A comprehensive nonlinear optical characterisation was performed both by second harmonic generation (SHG) and two photon fluorescence spectroscopy (2PF). We demonstrate and explain the enhancement of the coherent and incoherent nonlinear optical emission by a higher order multipolar mode of the plasmonic structure. The peculiarities of the mode shape and its influence on intensity and polarisation of the nonlinear signal are experimentally and numerically confirmed.

Graphical abstract: Nonlinear optical enhancement caused by a higher order multipole mode of metallic triangles

Supplementary files

Article information

Article type
Paper
Submitted
24 Oct 2014
Accepted
10 Dec 2014
First published
07 Jan 2015

J. Mater. Chem. C, 2015,3, 1576-1581

Author version available

Nonlinear optical enhancement caused by a higher order multipole mode of metallic triangles

M. A. van der Veen, G. Rosolen, T. Verbiest, M. K. Vanbel, B. Maes and B. Kolaric, J. Mater. Chem. C, 2015, 3, 1576 DOI: 10.1039/C4TC02427C

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