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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)
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Submitter: WRIGHT O. B.
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