High-efficiency collimation of airborne sound through a single deep-subwavelength aperture in an ultra-thin planar plate
- Publication Type:
- Journal Article
- Applied Physics Express, 2019, 12 (2)
- Issue Date:
Files in This Item:
Copyright Clearance Process
- Recently Added
- In Progress
- Open Access
This item is currently unavailable due to the publisher's embargo.
The embargo period expires on 2 Feb 2020
© 2019 The Japan Society of Applied Physics. We propose a mechanism for high-efficiency collimation of airborne sound through an ultra-thin planar structure perforated with a single deep-subwavelength aperture by combining a zigzag-shaped structure with arrays of subwavelength resonators to increase the equivalent refractive index and eliminate high-order diffractive waves simultaneously. Numerical simulations demonstrate that the proposed mechanism enables remarkably enhanced transmission and strong collimation of the transmitted wave, which propagates for a strikingly long distance exceeding 125 wavelengths. Due to its capabilities and flexibility, the proposed design opens up possibilities for novel compact acoustic-steering devices and may have far-reaching impacts in diverse applications such as acoustic communications and loudspeaker design.
Please use this identifier to cite or link to this item: