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Imaging Ripples on Phononic Crystals Reveals Acoustic Band Structure and Bloch Harmonics

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Title: Imaging Ripples on Phononic Crystals Reveals Acoustic Band Structure and Bloch Harmonics
Authors: Profunser, Dieter M. Browse this author
Wright, Oliver B. Browse this author
Matsuda, Osamu Browse this author →KAKEN DB
Issue Date: 4-Aug-2006
Publisher: American Physical Society
Journal Title: Physical Review Letters
Volume: 97
Start Page: 055502
Publisher DOI: 10.1103/PhysRevLett.97.055502
PMID: 17026111
Abstract: Broadband surface phonon wave packets on a phononic crystal made up of a microstructured line pattern are tracked in two dimensions and in real time with an ultrafast optical technique. The eigenmode distribution and the 2D acoustic band structure are obtained from spatiotemporal Fourier transforms of the data up to 1 GHz. We find stop bands at the zone boundaries for both leaky-longitudinal and Rayleigh waves, and show how the structure of individual acoustic eigenmodes in k space depends on Bloch harmonics and on mode coupling.
Rights: Copyright ©2006 American Physical Society
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松田 理

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