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Title: Generation of steep phase anisotropy with zero-backscattering by arrays of coupled dielectric nano-resonators

The interaction of light with high-permittivity dielectric nano-resonators can lead to zero-backscattering (i.e., full transmission), attributed to the simultaneous excitation of electric and magnetic dipolar modes in these resonators. In this paper, we numerically demonstrate that 2-dimensional Si nanocuboid arrays with anisotropic periodicity and finely tuned cuboid height can generate up to 2π optical phase anisotropy with zero-backscattering. Especially, by introducing strong Fano-type coupling into unit cells of the array, the induced phase anisotropy becomes ultra-steep with excitation wavelength. These special optical properties promise applications in various transmissive photonic devices, and we discuss their potential applications in transmissive polarization conversion and sensing.
Authors:
 [1] ;  [2] ;  [1] ;  [3]
  1. Liquid Crystal Institute and the Department of Chemical Physics, Kent State University, Kent, Ohio 44242 (United States)
  2. (United States)
  3. Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
22350742
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; BACKSCATTERING; CONVERSION; COUPLING; DIELECTRIC MATERIALS; EXCITATION; INTERACTIONS; NANOSTRUCTURES; OPTICAL PROPERTIES; PERIODICITY; PERMITTIVITY; POLARIZATION; RESONATORS; TRANSMISSION; VISIBLE RADIATION; WAVELENGTHS