Far-Field Superoscillatory Metamaterial Superlens

Yuan, Guanghui; Rogers, Katrine S.; Rogers, Edward T. F. and Zheludev, Nikolay I. (2019). Far-Field Superoscillatory Metamaterial Superlens. Physical Review Applied, 11, article no. 064016.

DOI: https://doi.org/10.1103/PhysRevApplied.11.064016

Abstract

We demonstrate a metamaterial superlens: a planar array of discrete subwavelength metamolecules with individual scattering characteristics tailored to vary spatially to create subdiffraction superoscillatory focus of, in principle, arbitrary shape and size. Metamaterial free-space lenses with previously unattainable effective numerical apertures – as high as 1.52 – and foci as small as 0.33λ in size are demonstrated. Super-resolution imaging with such lenses is experimentally verified breaking the conventional diffraction limit of resolution and exhibiting resolution close to the size of the focus. Our approach will enable far-field label-free super-resolution nonalgorithmic microscopies at harmless levels of intensity, including imaging inside cells, nanostructures, and silicon chips, without impregnating them with fluorescent materials.

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About

• Item ORO ID
• 61766
• Item Type
• Journal Item
• ISSN
• 2331-7019
• Project Funding Details

• Funded Project Name	Project ID	Funding Body
  Not Set	Grant No. MOE2016-T3-1-006	Singapore Ministry of Education
  Not Set	Grant No. SERC A1685b0005	Agency for Science, Technology and Research (A*STAR) Singapore
  Not Set	Grants No. EP/N00762X/1 and No. EP/M0091221	Engineering and Physical Sciences Research Council UK
  Not Set	Grant No. WM03	Wessex Medical Research

• Keywords
• superoscillation; metamaterials; imaging
• Academic Unit or School
• Faculty of Science, Technology, Engineering and Mathematics (STEM) > Mathematics and Statistics
  Faculty of Science, Technology, Engineering and Mathematics (STEM)
• Research Group
• Physics
• Copyright Holders
• © 2019 Physical Review Applied
• Depositing User
• Katrine Rogers