Pump-probe spectroscopy study of ultrafast temperature dynamics in nanoporous gold

Ortolani, Michele; Mancini, Andrea; Budweg, Arne; Garoli, Denis; Brida, Daniele; de Angelis, Francesco

Pump-probe spectroscopy study of ultrafast temperature dynamics in nanoporous gold

Dateien

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Datum

2019

Autor:innen

Ortolani, Michele

Mancini, Andrea

Budweg, Arne

Garoli, Denis

Brida, Daniele

de Angelis, Francesco

DOI (zitierfähiger Link)

https://doi.org/10.1103/PhysRevB.99.035435

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 2019, 99(3), 035435. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.99.035435

Zusammenfassung

We explore the influence of the nanoporous structure on the thermal relaxation of electrons and holes excited by ultrashort laser pulses (∼7fs) in thin gold films. Plasmon decay into hot electron-hole pairs results in the generation of a Fermi-Dirac distribution thermalized at a temperature T_e higher than the lattice temperature T_l. The relaxation times of the energy exchange between electrons and lattice, here measured by pump-probe spectroscopy, is slowed down by the nanoporous structure, resulting in much higher peak T_e than for bulk gold films. The electron-phonon coupling constant and the Debye temperature are found to scale with the metal filling factor f and a two-temperature model reproduces the data. The results open the way for electron temperature control in metals by engineering of the nanoporous geometry.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

ORTOLANI, Michele, Andrea MANCINI, Arne BUDWEG, Denis GAROLI, Daniele BRIDA, Francesco DE ANGELIS, 2019. Pump-probe spectroscopy study of ultrafast temperature dynamics in nanoporous gold. In: Physical Review B. 2019, 99(3), 035435. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.99.035435

BibTex

@article{Ortolani2019-01-24Pumpp-44767,
  year={2019},
  doi={10.1103/PhysRevB.99.035435},
  title={Pump-probe spectroscopy study of ultrafast temperature dynamics in nanoporous gold},
  number={3},
  volume={99},
  issn={2469-9950},
  journal={Physical Review B},
  author={Ortolani, Michele and Mancini, Andrea and Budweg, Arne and Garoli, Denis and Brida, Daniele and de Angelis, Francesco},
  note={Article Number: 035435}
}

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