jp406357p_si_001.pdf (210.81 kB)
Electron–Phonon Scattering in 2D Silver Nanotriangles
journal contribution
posted on 2013-10-24, 00:00 authored by Benoît Dacosta Fernandes, Aurélie Le Beulze, Fabien Moroté, Jean Oberlé, Mona Tréguer-Delapierre, Julien Burgin, Pierre LangotElectron–phonon
energy exchanges are investigated in 2D
silver nanotriangles of thickness ranging from 5 to 8 nm and lateral
size ranging from 25 to 85 nm, using time-resolved femtosecond spectroscopy
in the low-perturbation regime. The measured electron–phonon
decay time is smaller in 2D nanotriangles than in bulk silver, and
its value corresponds to the decay time measured in isolated nanospheres
with a diameter equal to the thickness of the nanotriangles. These
results show that the electron–phonon energy exchanges in 2D
nanosystems are strongly accelerated by confinement and this acceleration
is directly governed by the smallest dimension of the nano-object.