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Issue 17, 2018
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Carrier recombination and plasmonic emission channels in metallic photoluminescence

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Abstract

We systematically investigate the metallic photoluminescence (MPL) emitted from plasmonic nanoparticles (NPs) upon excitation with ultrafast laser pulses using a scanning confocal optical microscope (SCOM). By comparing the emission spectra of Au NPs of varying dimensions with the corresponding dark-field scattering spectra, indications are found that MPL encompasses two emission channels: the particle plasmons (PPs) and the electron–hole (e–h) pair recombination. The plasmons can be interpreted to play a twofold role: in the excitation process they provide the local field enhancement, and in the emission process they offer extra radiation channels.

Graphical abstract: Carrier recombination and plasmonic emission channels in metallic photoluminescence

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Supplementary files

Article information


Submitted
20 Oct 2017
Accepted
13 Mar 2018
First published
23 Apr 2018

Nanoscale, 2018,10, 8240-8245
Article type
Paper

Carrier recombination and plasmonic emission channels in metallic photoluminescence

J. Wang, E. Gürdal, A. Horneber, S. Dickreuter, S. Kostcheev, A. J. Meixner, M. Fleischer, P. Adam and D. Zhang, Nanoscale, 2018, 10, 8240
DOI: 10.1039/C7NR07821H

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