Journal
JOURNAL OF APPLIED PHYSICS
Volume 129, Issue 14, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0041503
Keywords
-
Categories
Funding
- University of Michigan
- National Science Foundation Graduate Research Fellowship [DGE 1256260]
Ask authors/readers for more resources
The ability to create directional sound beams is critical in acoustic sensing. Traditional methods using phased arrays to produce beams increase costs and complexity. This research proposes a novel approach using reconfigurable origami phononic structures with adjustable metamaterial inclusions to create steerable collimated beams in air.
The ability to create directional sound beams is fundamental to acoustic sensing. Traditionally, acoustic beams are most commonly produced by phased arrays, which increase the cost and complexity of the systems in which they are implemented. Phononic structures have theoretically been shown to possess Dirac cones that can be manipulated to produce angular collimated beams. Dirac cones are usually encountered in phononic crystals with inclusions significantly more compressible than the surrounding media, e.g., rubber inclusions in a water medium, a characteristic not easily realized in air. In addition, there are no effective and practical means to tune phononic structures that can achieve a broad range of Dirac point manipulation, which is essential to changing the direction and focus of acoustic beams. To advance the state of the art, this research proposes a novel approach to produce steerable collimated beams in air by harnessing reconfigurable origami phononic structures with adjustable metamaterial inclusions. The proposed structure is shown to produce dramatic lattice reconfiguration and control of Dirac points in a broad range, and thus achieve collimated beams with on-demand tunable frequency and angle. These advancements provide a simple, cost-effective alternative to acoustic phased arrays, greatly expanding the potential of acoustic sensing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available