The imaging resolution of conventional lenses is limited by diffraction. Artificially engineered metamaterials now offer the possibility of building a superlens that overcomes this limit. We review the physics of such superlenses and the theoretical and experimental progress in this rapidly developing field. Superlenses have great potential in applications such as biomedical imaging, optical lithography and data storage.
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This work was supported by NSF NSEC award DMI-0327077, ARO MURI award 50432-PH-MUR and AFOSR MURI award FA9550-04-1-0434.
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Zhang, X., Liu, Z. Superlenses to overcome the diffraction limit. Nature Mater 7, 435–441 (2008). https://doi.org/10.1038/nmat2141
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