Pure solid acoustic metasurface with coating adapter. (9th April 2019)

• Record Type: Journal Article
• Authors: Ma, Fuyin; Xu, Yicai; Wu, Jiu Hui
• Is Part Of: Applied physics express. Volume 12:Number 5(2019)
• Publication Date: 2019-04-09
• Subjects: coating adapter -- acoustic metasurface -- double negative -- pure solid; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/1882-0786/ab130c
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: We propose a conceptual coating adapter design for pure solid acoustic metasurfaces with thickness to the deep subwavelength scale, wherein the coating adapter is defined as an ultra-thin soft-solid layer that can adapt to relative movements or superpose the phases of stiff plates on either side. Remarkably, by employing a special coating adapter between two stiff plates to constitute a sandwich plate, the following were successively realized: broadband double negative bands with simultaneously negative effective mass density and bulk modulus, continuous phase shifts for reflected wavefronts almost covering 0–2 π range, and a pure solid two-dimensional ultra-thin broadband acoustical dark skin.