Skip to Main content Skip to Navigation
Journal articles

Controlling the Quality Factor of a Single Acoustic Nanoresonator by Tuning its Morphology

Abstract : The mechanical vibrations of individual gold nanodisks nanopatterned on a sapphire substrate are investigated using ultrafast time-resolved optical spectroscopy. The number and characteristics of the detected acoustic modes are found to vary with nanodisk geometry. In particular, their quality factors strongly depend on nanodisk aspect ratio (i.e., diameter over height ratio), reaching a maximal value of ≈70, higher than those previously measured for substrate-supported nano-objects. The peculiarities of the detected acoustic vibrations are confirmed by finite-element simulations, and interpreted as the result of substrate-induced hybridization between the vibrational modes of a nanodisk. The present findings demonstrate novel possibilities for engineering the vibrational modes of nano-objects.
Document type :
Journal articles
Complete list of metadatas

https://hal-univ-lyon1.archives-ouvertes.fr/hal-02290283
Contributor : Depot 3 Lyon 1 <>
Submitted on : Tuesday, September 17, 2019 - 3:14:41 PM
Last modification on : Monday, October 26, 2020 - 3:06:03 PM

Identifiers

Collections

Citation

F. Medeghini, A. Crut, M. Gandolfi, F. Rossella, P. Maioli, et al.. Controlling the Quality Factor of a Single Acoustic Nanoresonator by Tuning its Morphology. Nano Letters, American Chemical Society, 2018, 18 (8), pp.5159-5166. ⟨10.1021/acs.nanolett.8b02096⟩. ⟨hal-02290283⟩

Share

Metrics

Record views

52