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Title: Imaging of sub-wavelength structures radiating coherently near microspheres

Using a two-dimensional model, we show that the optical images of a sub-wavelength object depend strongly on the excitation of its electromagnetic modes. There exist modes that enable the resolution of the object features smaller than the classical diffraction limit, in particular, due to the destructive interference. We propose to use such modes for super-resolution of resonant structures such as coupled cavities, metal dimers, or bowties. A dielectric microsphere in contact with the object forms its magnified image in a wide range of the virtual image plane positions. It is also suggested that the resonances may significantly affect the resolution quantification in recent experimental studies.
Authors:
 [1] ;  [2]
  1. University of Nizhny Novgorod, Nizhny Novgorod 603950 (Russian Federation)
  2. Department of Physics and Optical Science, Center for Optoelectronics and Optical Communications, University of North Carolina at Charlotte, Charlotte, North Carolina 28223-0001 (United States)
Publication Date:
OSTI Identifier:
22489386
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 5; Other Information: (c) 2016 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; DIELECTRIC MATERIALS; DIFFRACTION; DIMERS; EXCITATION; IMAGES; INTERFERENCE; METALS; MICROSPHERES; RESOLUTION; RESONANCE; WAVELENGTHS