47 research outputs found
Superlensing effect of an anisotropic metamaterial slab with near-zero dynamic mass
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-P\'erot 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.Comment: 4 figure