2011/04/29 by Xiaoming Zhou, Gengkai Hu · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Acoustic Wave Phenomena Research #Acoustic metamaterials #Anisotropy #Diffraction #Electromagnetic Scattering and Analysis #Lens (geology) #Metamaterial #Metamaterials and Metasurfaces Applications #Negative refraction #Slab #Superlens #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.3607277
4 figures
arxiv created 2011/04/29 · openalex publication_date 2011/06/27 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A metamaterial slab of anisotropic mass with one diagonal component being infinity and the other being zero is demonstrated to behave as a superlens for acoustic imaging beyond the diffraction limit. The underlying mechanism for extraordinary transmission of evanescent waves is attributed to the zero mass effect. Microstructure design for such anisotropic lens is also presented. In contrast to the anisotropic superlens based on Fabry-Pérot resonant mechanism, the proposed lens operates without the limitation on lens thickness, thus more flexible in practical applications. Numerical modeling is performed to validate the proposed ideas.