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

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

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 extract...

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Bibliographic Details
Main Authors:	Osamu Matsuda, Hiroaki Koga, Hiroki Nishita, Motonobu Tomoda, Paul H. Otsuka, Oliver B. Wright
Format:	Article
Language:	English
Published:	Elsevier 2023-04-01
Series:	Photoacoustics
Subjects:	Picosecond laser ultrasonics Surface acoustic waves Time-resolved imaging Acoustic field Dispersion relation Phononic crystal
Online Access:	http://www.sciencedirect.com/science/article/pii/S2213597923000241

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