Controlling the angle range in acoustic low-frequency forbidden transmission in solid-fluid superlattice

Sai Zhang, Bai Qiang Xu, Wenwu Cao

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We have investigated low-frequency forbidden transmission (LFT) of acoustic waves with frequency lower than the first Bragg bandgap in a solid-fluid superlattice (SFSL). LFT is formed when the acoustic planar wave impinges on the interface of a SFSL within a certain angle range. However, for the SFSL comprised of metallic material and water, the angle range of LFT is extremely narrow, which restricts its practical applications. The variation characteristics of the angle range have been comprehensively studied here by the control variable method. The results suggest that the filling ratio, layer number, wave velocity, and mass density of the constituent materials have a significant impact on the angle range. Based on our results, an effective strategy for obtaining LFT with a broad angle range is provided, which will be useful for potential applications of LFT in various devices, such as low frequency filters and subwavelength one-way diodes.

Original languageEnglish (US)
Article number115111
JournalJournal of Applied Physics
Volume123
Issue number11
DOIs
StatePublished - Mar 21 2018

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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