Refraction, beam splitting and dispersion of GHz surface acoustic waves by a phononic crystal

Matsuda, Osamu; Koga, Hiroaki; Nishita, Hiroki; Tomoda, Motonobu; Otsuka, Paul H.; Wright, Oliver B.

Refraction, beam splitting and dispersion of GHz surface acoustic waves by a phononic crystal

Matsuda, Osamu; Koga, Hiroaki; Nishita, Hiroki et al.

Photoacoustics, 2023, 30, 100471

Permalink : https://hdl.handle.net/2115/89249

このアイテムのアクセス数:246件（2026-08-09 20:08 集計）

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https://doi.org/10.1016/j.pacs.2023.100471			11

論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/89249
タイトル	Refraction, beam splitting and dispersion of GHz surface acoustic waves by a phononic crystal
著者	Matsuda, Osamu ; Koga, Hiroaki ; Nishita, Hiroki ; Tomoda, Motonobu ; Otsuka, Paul H. ; Wright, Oliver B.
e-Rad_Researcher 30239024 著者名 Matsuda, Osamu
e-Rad_Researcher 80519413 著者名 Koga, Hiroaki
著者名 Nishita, Hiroki
e-Rad_Researcher 30344485 著者名 Tomoda, Motonobu
著者名 Otsuka, Paul H.
e-Rad_Researcher 90281790 著者名 Wright, Oliver B.
言語	英語
キーワード	Picosecond laser ultrasonics
	Surface acoustic waves
	Time-resolved imaging
	Acoustic field
	Dispersion relation
	Phononic crystal
発行日	2023-04
出版者	Elsevier
収録物名	Photoacoustics
巻(号)	30
ページ	100471
抄録	We exploit a time-resolved ultrafast optical technique to study the propagation of point-excited surface acoustic waves on a microscopic two-dimensional phononic crystal in the form of a square lattice of holes in a silicon substrate. Constant-frequency images and the dispersion relation are extracted, and the latter measured in detail in the region around the phononic band gap. Mode conversion and refraction at the interface between the phononic crystal and surrounding non-structured silicon substrate is studied at constant frequencies. Symmetric phonon beam splitting, for example, is shown to lead to a striking Maltese-cross pattern when phonons exit a square region of phononic crystal excited near its center.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	©2023 The Author(s). Published by Elsevier GmbH. This is an open access article under the CC BY-NC-ND 4.0 license(https://creativecommons.org/licenses/by-nc-nd/4.0/)
PISSN	2213-5979
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1016/j.pacs.2023.100471