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Recent Advances in Non-Traditional Elastic Wave Manipulation by Macroscopic Artificial Structures

Title
Recent Advances in Non-Traditional Elastic Wave Manipulation by Macroscopic Artificial Structures
Authors
PARK, JEONGHOONLEE, DONGWOORHO, JUNSUK
Date Issued
Jan-2020
Publisher
MDPI
Abstract
Metamaterials are composed of arrays of subwavelength-sized artificial structures; these architectures give rise to novel characteristics that can be exploited to manipulate electromagnetic waves and acoustic waves. They have been also used to manipulate elastic waves, but such waves have a coupling property, so metamaterials for elastic waves uses a different method than for electromagnetic and acoustic waves. Since researches on this type of metamaterials is sparse, this paper reviews studies that used elastic materials to manipulate elastic waves, and introduces applications using extraordinary characteristics induced by metamaterials. Bragg scattering and local resonances have been exploited to introduce a locally resonant elastic metamaterial, a gradient-index lens, a hyperlens, and elastic cloaking. The principles and applications of metasurfaces that can overcome the disadvantages of bulky elastic metamaterials are discussed.
URI
http://oasis.postech.ac.kr/handle/2014.oak/100815
ISSN
2076-3417
Article Type
Article
Citation
Applied Sciences-Basel, vol. 10, no. 2, page. 547, 2020-01
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 RHO, JUNSUK
Dept of Mechanical Enginrg
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