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Title: Point spread function of the optical needle super-oscillatory lens

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.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [4]
  1. Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, Highfield, Southampton, SO17 1BJ (United Kingdom)
  2. (United Kingdom)
  3. Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371 (Singapore)
  4. (Singapore)
Publication Date:
OSTI Identifier:
22300022
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APERTURES; DIFFRACTION; FOCUSING; LENSES; OSCILLATIONS; WAVELENGTHS