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Title: Microsphere-chain waveguides: Focusing and transport properties

It is shown that the focusing properties of polystyrene microsphere-chain waveguides (MCWs) formed by sufficiently large spheres (D ≥ 20λ, where D is the sphere diameter and λ is the wavelength of light) scale with the sphere diameter as predicted by geometrical optics. However, this scaling behavior does not hold for mesoscale MCWs with D ≤ 10λ resulting in a periodical focusing with gradually reducing beam waists and in extremely small propagation losses. The observed effects are related to properties of nanojet-induced and periodically focused modes in such structures. The results can be used for developing focusing microprobes, laser scalpels, and polarization filters.
Authors:
;  [1] ;  [2] ; ;  [1] ; ;  [3] ;  [4]
  1. 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)
  2. (United States)
  3. Air Force Research Laboratory, Sensors Directorate, Wright Patterson AFB, Ohio 45433 (United States)
  4. Institut d'Electronique Fondamentale, UMR 8622 CNRS, Universite Paris-Sud XI, 91405 Orsay (France)
Publication Date:
OSTI Identifier:
22311066
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 2; 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; BEAMS; FILTERS; FOCUSING; LASER RADIATION; LOSSES; OPTICS; PERIODICITY; POLARIZATION; POLYSTYRENE; SCALING; SPHERES; VISIBLE RADIATION; WAVEGUIDES; WAVELENGTHS