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Communication Dans Un Congrès Année : 2022

Ultrafast photoacoustic assessment of mechanical properties in InAs nanowires

Marco Gandolfi
  • Fonction : Auteur
  • PersonId : 1185462
Simone Peli
  • Fonction : Auteur
  • PersonId : 1185472
Stefano Danesi
  • Fonction : Auteur
  • PersonId : 1185473
Claudio Giannetti
  • Fonction : Auteur
  • PersonId : 1087197
Ivano Alessandri
  • Fonction : Auteur
  • PersonId : 1185474
Valentina Zannier
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  • PersonId : 1185475
Valeria Demontis
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  • PersonId : 1185476
Mirko Rocci
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Fabio Beltram
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  • PersonId : 1185478
Lucia Sorba
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  • PersonId : 1185479
Stefano Roddaro
  • Fonction : Auteur
  • PersonId : 1185480
Francesco Rossella
  • Fonction : Auteur
  • PersonId : 1185469
Francesco Banfi
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  • PersonId : 1185467

Résumé

Nanowires (NWs) have been at the forefront of research in nanoscience for over two decades because of the wide range of applications driven by their peculiar properties [1]. Among the latter, mechanical properties play a crucial role in view of any device development, but, despite the effort, a clear understanding is still lacking [2]. We report [3] on the ultrafast photoaoustics investigation of the mechanical properties of vertical Wurtzite InAs NW. The assessment of the NW oscillation period versus NW length allows to properly access the elastic dispersion relation and to shed light on the long-standing problem of InAs NW mechanical properties. Specifically, a benchmarked elastic matrix is provided. A novel mechanism, triggering the mechanical oscillations, is unveiled. The nanowire oscillations originate from an impulsive “hammer-like” excitation triggered in the substrate and propagating in a wave-like motion into the NW. This mechanism constitutes a new paradigm, being at variance with respect to direct excitation mechanisms, as commonly encountered in ultrafast experiments on a plethora of nanosystems. The present rationalization of the genesis of the mechanical oscillations impacts ultrafast opto-mechanical applications at large and will contribute designing them beyond a trial-and-error approach. [1] C. Jia, Z. Lin, Y. Huang, X. Duan, Chemical reviews 119, 9074–9135 (2019,) [2] S. O. Mariager, D. Khakhulin, H. T. Lemke, K. S. Kjær, L. Guerin, L. Nuccio, C. B. Sørensen, M. M. Nielsen & R. Feidenhans’l, Nano Letters, 10, 2461–2465 (2010). [3] S. Peli, E. Cavaliere, G. Benetti, M. Gandolfi, M. Chiodi, C. Cancellieri, C. Giannetti, G. Ferrini, L. Gavioli & F. Banfi, The Journal of Physical Chemistry C, 120, 8 (2016).
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Dates et versions

hal-03848295 , version 1 (10-11-2022)

Identifiants

  • HAL Id : hal-03848295 , version 1

Citer

Michele Diego, Marco Gandolfi, Simone Peli, Stefano Danesi, Claudio Giannetti, et al.. Ultrafast photoacoustic assessment of mechanical properties in InAs nanowires. 16ème Congrès Français d'Acoustique, CFA2022, Société Française d'Acoustique; Laboratoire de Mécanique et d'Acoustique, Apr 2022, Marseille, France. ⟨hal-03848295⟩
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