Ultrafast Heat Transfer at the Nanoscale: Controlling Heat Anisotropy - Institut d'Optique Graduate School Access content directly
Journal Articles ACS photonics Year : 2023

Ultrafast Heat Transfer at the Nanoscale: Controlling Heat Anisotropy

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.
Fichier principal
Vignette du fichier
ArticleBryche_Vega_2023-vLab.pdf (8.43 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-04059607 , version 1 (01-06-2023)
hal-04059607 , version 2 (05-06-2023)

Identifiers

Cite

Jean-François Bryche, Marlo Vega, Julien Moreau, Paul-Ludovic Karsenti, Paul Bresson, et al.. Ultrafast Heat Transfer at the Nanoscale: Controlling Heat Anisotropy. ACS photonics, 2023, 4 (10), pp.1177-1186. ⟨10.1021/acsphotonics.2c01968⟩. ⟨hal-04059607v1⟩
137 View
16 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More