Extraordinary transmission of gigahertz surface acoustic waves

Sylvain Mezil, Kazuki Chonan, Paul H. Otsuka, Motonobu Tomoda, Osamu Matsuda, Sam H. Lee, Oliver B. Wright

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


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 ? ∼ 3-50 μm, 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 ∼23 and ∼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.

Original languageEnglish
Article number33380
JournalScientific reports
Publication statusPublished - 2016 Sept 19

Bibliographical note

Funding Information:
National Research Foundation of Korea (NRF)

All Science Journal Classification (ASJC) codes

  • General


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