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Extraordinary transmission of gigahertz surface acoustic waves

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Title: Extraordinary transmission of gigahertz surface acoustic waves
Authors: Mezil, Sylvain Browse this author
Chonan, Kazuki Browse this author
Otsuka, Paul H. Browse this author
Tomoda, Motonobu Browse this author →KAKEN DB
Matsuda, Osamu Browse this author →KAKEN DB
Lee, Sam H. Browse this author
Wright, Oliver B. Browse this author →KAKEN DB
Issue Date: 19-Sep-2016
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 6
Start Page: 33380
Publisher DOI: 10.1038/srep33380
Abstract: Extraordinary transmission of waves, i.e. a transmission superior to the amount predicted by geometrical considerations of the aperture alone, has to date only been studied in the bulk. Here we present a new class of extraordinary transmission for waves confined in two dimensions to a flat surface. By means of acoustic numerical simulations in the gigahertz range, corresponding to acoustic wavelengths lambda similar to 3-50 mu m, we track the transmission of plane surface acoustic wave fronts between two silicon blocks joined by a deeply subwavelength bridge of variable length with or without an attached cavity. Several resonant modes of the structure, both one-and two-dimensional in nature, lead to extraordinary acoustic transmission, in this case with transmission efficiencies, i.e. intensity enhancements, up to similar to 23 and similar to 8 in the two respective cases. We show how the cavity shape and bridge size influence the extraordinary transmission efficiency. Applications include new metamaterials and subwavelength imaging.
Rights: http://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/63514
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: WRIGHT O. B.

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