Efficient excitation of guided acoustic waves in semiconductor nanorods through external metallic acoustic transducer

Szu Chi Yang, Yueh Chun Wu, Pierre Adrien Mante, Chien Cheng Chen, Hung Pin Chen, Hsiang Yu Chou, Min Hsiung Shih, Chi Kuang Sun

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

We demonstrate that guided acoustic waves inside a nanorod can be excited through an external metallic acoustic transducer. By attaching gold nanodisks on top of GaAs nanorods, the femtosecond optical excitation on the external acoustic transducer enables the generation of guided acoustic waves in the rods. The propagation behavior and mode shape of the observed guided acoustic waves are analyzed. These observations would not only lead to the development of superior external transducers for acoustic imaging, but also provide an experimental system for the study of the acoustic phonon transport behavior in nanorods and nanowires.

Original languageEnglish
Article number243101
JournalApplied Physics Letters
Volume105
Issue number24
DOIs
Publication statusPublished - 15 Dec 2014
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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