Transport properties of guided acoustic phonon modes in semiconductor nanorods

Chi Kuang Sun, Szu Chi Yang, Yueh Chun Wu, Pierre Adrien Mante, Min Hsiung Shih

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Quantization and abnormality of thermal conductance was discovered in low-dimensional nanostructures, where guided modes were proposed to contribute the universal quantum. However, no direct observation of the guided-mode propagation inside 1D nanostructures was thought possible, which is critical for quantitative transport-property studies. In this talk, we report direct observation of guided acoustic-phonon mode transportation inside semiconductor nanorods. The observed dispersion behavior agrees well with our theory. Moreover, owing to the dimensional discontinuousness, ≧ 50% acoustic wave reflection at the nanorod/substrate interface is found, which would play a crucial role in heat dissipation and thermal management in future nanodevices.

Original languageEnglish
Title of host publication22nd International Congress on Sound and Vibration, ICSV 2015
PublisherInternational Institute of Acoustics and Vibrations
ISBN (Electronic)9788888942483
Publication statusPublished - 1 Jan 2015
Externally publishedYes
Event22nd International Congress on Sound and Vibration, ICSV 2015 - Florence, Italy
Duration: 12 Jul 201516 Jul 2015

Publication series

Name22nd International Congress on Sound and Vibration, ICSV 2015

Conference

Conference22nd International Congress on Sound and Vibration, ICSV 2015
CountryItaly
CityFlorence
Period12/07/1516/07/15

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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