An ultrasonic metallic Fabry–Pérot metamaterial for use in water
MetadataShow full item record
Fabry-Pérot ultrasonic metamaterials have been additively manufactured using laser powder bed fusion to contain subwavelength holes with a high aspect-ratio of width to depth. Such metamaterials require the acoustic impedance mismatch between the structure and the immersion medium to be large. It is shown for the first time that metallic structures fulfil this criterion for applications in water over the 200–800 kHz frequency range. It is also demonstrated that laser powder bed fusion is a flexible fabrication method for the ceration of structures with different thicknesses, hole geometry and tapered openings, allowing the acoustic properties to be modified. It was confirmed via both finite element simulation and practical measurements that these structures supported Fabry-Pérot resonances, needed for metamaterial operation, at ultrasonic frequencies in water. It was also demonstrated the the additively-manufactured structures detected the presence of a sub-wavelength slit aperture in water.
Askari , M , Hutchins , D A , Watson , R L , Astolfi , L , Nie , L , Freear , S , Thomas , P J , Laureti , S , Ricci , M , Clark , M & Clare , A T 2020 , ' An ultrasonic metallic Fabry–Pérot metamaterial for use in water ' , Additive Manufacturing , vol. 35 , 101309 . https://doi.org/10.1016/j.addma.2020.101309
Copyright © 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Showing items related by title, author, creator and subject.
Al-Masha'Al, A.; Mastropaolo, E.; Bunting, A.; Dunare, C.; Cheung, Rebecca (2017-01) - Journal articleAn investigation of the influence of deposition and post-fabrication processes on the final mechanical structure of tantalum beams is reported in the present study. The final deflection profiles of doubly supported beams ...
Spontaneous emission enhancement in strain-induced WSe2 monolayer-based quantum light sources on metallic surfaces Tripathi, Laxmi Narayan; Iff, Oliver; Betzold, Simon; Dusanowski, Łukasz; Emmerling, Monika; Moon, Kihwan; Lee, Young Jin; Kwon, Soon Hong; Höfling, Sven; Schneider, Christian (2018-05-16) - Journal articleAtomic monolayers of transition metal dichalcogenides represent an emerging material platform for the implementation of ultracompact quantum light emitters via strain engineering. In this framework, we discuss experimental ...
Demčenko, Andriejus; Mazilu, Michael; Wilson, Rab; Volker, Arno W.F.; Cooper, Jonathan M. (2018-06) - Journal articleIn this paper we show that acoustoelasticity in hyperelastic materials can be understood using the framework of non-linear wave mixing, which, when coupled with an induced static stress, leads to a change in the phase ...