Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4882246
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Funding
- United Kingdom Engineering and Physical Sciences Research Council [EP/F040644/1, EP/G060363/1]
- University of Southampton Enterprise Fund
- Advanced Optics in Engineering Programme, A*STAR, Singapore [122-360-0009]
- Royal Society of London
- EPSRC [EP/F040644/1, EP/G060363/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G060363/1, EP/F040644/1] Funding Source: researchfish
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Super-oscillatory optical lenses are known to achieve sub-wavelength focusing. In this paper, we analyse the imaging capabilities of a super-oscillatory lens by studying its point spread function. We experimentally demonstrate that a super-oscillatory lens can generate a point spread function 24% smaller than that dictated by the diffraction limit and has an effective numerical aperture of 1.31 in air. The object-image linear displacement property of these lenses is also investigated. (C) 2014 AIP Publishing LLC.
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