Plasmonic and interband excitations of Au nanoparticles lead to different relaxation pathways

Ferrera, M. (2021) Plasmonic and interband excitations of Au nanoparticles lead to different relaxation pathways. Il nuovo cimento C, 44 (1). pp. 1-8. ISSN 1826-9885

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Abstract

Thedirect assessment of the ultrafast temperature evolution of metallic nano-objects irradiated by a laser pulse is extremely challenging. The static thermo-optical response of plasmonic systems can be exploited as an effective spectroscopic tool to measure the temperature of impulsively excited systems after electrons and phonons have thermalized. This work shows measurements of the relaxation dynamics of ensembles of gold nanoparticles irradiated with laser pulses having two distinct photon energies, one falling within the interband transition spectral region, the other matching the plasmonic resonance. The dynamic response of these metallic nanoparticles depends on the energy of the exciting radiation.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 19 Jul 2021 09:50
Last Modified: 19 Jul 2021 09:50
URI: http://eprints.bice.rm.cnr.it/id/eprint/21281

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