A graded Miura-ori phononic crystals lens
Journal
Physics Letters, Section A: General, Atomic and Solid State Physics
Journal Volume
418
Start Page
127701
ISSN
03759601
Date Issued
2021
Author(s)
Abstract
As an art of paper folding, origami has inspired designs of diverse tailorable mechanical structures within physics and engineering communities. In this letter, by introducing a unilateral gradient on the Miura-ori crease pattern, we realize a gradient-index (GRIN) origami phononic crystal (PC) lens. The width distribution of a pair of adjacent panels is designed to allow the graded Miura-ori PC lens to have a refractive index variation highest at the center axis and a hyperbolic secant gradient distribution along a direction transverse to the direction of the Lamb wave propagation. The folding angle-dependent gradient refractive index distribution gradually bends and focuses the incident waves at different frequencies toward the center axis. Both numerical modeling and experimental verification are conducted to validate the focusing of the plane wave on the graded Miura-ori PC lens.
Subjects
Lamb Waves
Metamaterials
Origami
Phononic Crystal (pc) Lens
Waveguides
Crystals
Phonons
Refractive Index
Ultrasonic Waves
Wave Propagation
Crystal Lens
Engineering Community
Gradient-index
Mechanical Structures
Origami
Paper Folding
Phononic Crystal
Phononic Crystal Lens
Physics Community
Refractive Index Variations
Surface Waves
Publisher
Elsevier B.V.
Type
journal article