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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.

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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.

Item Type: Journal Item
Copyright Holders: 2019 Physical Review Applied
ISSN: 2331-7019
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetGrant No. MOE2016-T3-1-006Singapore Ministry of Education
Not SetGrant No. SERC A1685b0005Agency for Science, Technology and Research (A*STAR) Singapore
Not SetGrants No. EP/N00762X/1 and No. EP/M0091221Engineering and Physical Sciences Research Council UK
Not SetGrant No. WM03Wessex Medical Research
Keywords: superoscillation; metamaterials; imaging
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Mathematics and Statistics
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Physics
Item ID: 61766
Depositing User: Katrine Rogers
Date Deposited: 12 Jun 2019 07:15
Last Modified: 24 Jun 2019 16:41
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