Acoustic phonons in nanowires probed by ultrafast pump-probe spectroscopy

Pierre-Adrien Mante (1) , Laurent Belliard (2, 3) , Bernard Perrin (2, 3)

1 POLYU - The Hong Kong Polytechnic University [Hong Kong]
2 INSP - Institut des Nanosciences de Paris
3 INSP-E3 - Acoustique pour les nanosciences

The fascinating relationship between structure and property in nanowires has enabled a wealth of applications in photonics and electronics. The behavior of phonons in nanowires is also modified compared to their bulk counterparts. In this review, we provide an overview of the recent efforts to investigate the properties of acoustic phonons in nanowires using ultrafast optical methods. In particular, we focus on the calculation of the modified phonon dispersion in nanowires and how to address them optically. We then discuss experimental investigations in arrays of nanowires and a single nanowire. The analysis of phonon behavior reveals the possibility to perform advanced mechanical characterization and to vary the thermal properties of nanowires. The review concludes with a brief perspective on future research directions, from phonon-induced control over properties to three-dimensional (3D) acoustic nano-imaging.

Mots clés: nanowires; acoustic phonons; femtosecond pump-probe spectroscopy; mechanical properties

Domaines: Physique [physics]; Science des matériaux [cond-mat.mtrl-sci]

Pierre-Adrien Mante, Laurent Belliard, Bernard Perrin. Acoustic phonons in nanowires probed by ultrafast pump-probe spectroscopy. Nanophotonics, 2018, 7 (11), pp.1759 - 1780. ⟨10.1515/nanoph-2018-0069⟩. ⟨hal-01922618⟩