journal article·2023-03-11Open access

Ultrafast Heat Transfer at the Nanoscale: Controlling Heat Anisotropy

Jean-François Bryche, Marlo Vega, Julien Moreau, Paul-Ludovic Karsenti, Paul Bresson, Mondher Besbes, Philippe Gogol, Denis Morris, Paul G. Charette, Michael Canva

Abstract

Thermoplasmonics has benefited from increasing attention in recent years by exploiting the photothermal effects within plasmonic nanoparticles to generate nanoscale heat sources. Recently, it has been demonstrated that exciting gold nanoparticles with ultrashort light pulses could be used to achieve high-speed light management and nanoscale heat-sensitive chemical reaction control. In this work, we study non-uniform thermal energy transient distribution inside cross-shaped nanostructures with femtosecond transient spectroscopy coupled to a thermo-optical numerical model, free of fitting parameters. We show experimentally and numerically that the polarization of the excitation light can control the heat distribution in the nanostructures. We also demonstrate the necessity of considering nonthermal electron ballistic displacement in fast transient heat dynamics models.
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Research context

OpenAlex topics: Gold and Silver Nanoparticles Synthesis and Applications · Spectroscopy and Quantum Chemical Studies · nanoparticles nucleation surface interactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, J1K 0A5 Sherbrooke, QC, Canada

Institut Interdisciplinaire d’Innovation Technologique (3IT), Université de Sherbrooke, J1K 0A5 Sherbrooke, QC, Canada

Faculté des Sciences, Université de Sherbrooke, J1K 2R1 Sherbrooke, QC, Canada

Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127 Palaiseau, France

Centre de Nanosciences et de Nanotechnologies, Université Paris-Saclay, CNRS, 91120 Palaiseau, France

Funding

Agence Nationale de la Recherche · Fonds de Recherche du Qu?bec - Nature et Technologies · Universit? Paris-Saclay · Universit? de Sherbrooke · Universit? Grenoble Alpes · Centre National de la Recherche Scientifique · Natural Sciences and Engineering Research Council of Canada · Institut National des Sciences Appliqu?es de Lyon · Ecole Centrale De Lyon

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