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Journal Articles Nanoscale Year : 2018

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.
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hal-02296873 , version 1 (25-09-2019)

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Jiyong Wang, Emre Gürdal, Anke Horneber, Simon Dickreuter, Serguei Kochtcheev, et al.. Carrier recombination and plasmonic emission channels in metallic photoluminescence. Nanoscale, 2018, 10 (17), pp.8240-8245. ⟨10.1039/C7NR07821H⟩. ⟨hal-02296873⟩

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