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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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Publication details

The article was received on 20 Oct 2017, accepted on 13 Mar 2018 and first published on 23 Apr 2018


Article type: Paper
DOI: 10.1039/C7NR07821H
Citation: Nanoscale, 2018,10, 8240-8245

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    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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