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      Broadband mixing of PT-symmetric and PT-broken phases in photonic heterostructures with a one-dimensional loss/gain bilayer

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      Author(s)
      Özgün E.
      Serebryannikov, A. E.
      Özbay, Ekmel
      Soukoulis, C. M.
      Date
      2017
      Source Title
      Scientific Reports
      Electronic ISSN
      2045-2322
      Publisher
      Nature Publishing Group
      Volume
      7
      Issue
      1
      Pages
      1 - 9
      Language
      English
      Type
      Article
      Item Usage Stats
      219
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      126
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      Abstract
      Combining loss and gain components in one photonic heterostructure opens a new route to efficient manipulation by radiation, transmission, absorption, and scattering of electromagnetic waves. Therefore, loss/gain structures enabling PT-symmetric and PT-broken phases for eigenvalues have extensively been studied in the last decade. In particular, translation from one phase to another, which occurs at the critical point in the two-channel structures with one-dimensional loss/gain components, is often associated with one-way transmission. In this report, broadband mixing of the PT-symmetric and PT-broken phases for eigenvalues is theoretically demonstrated in heterostructures with four channels obtained by combining a one-dimensional loss/gain bilayer and one or two thin polarization-converting components (PCCs). The broadband phase mixing in the four-channel case is expected to yield advanced transmission and absorption regimes. Various configurations are analyzed, which are distinguished in symmetry properties and polarization conversion regime of PCCs. The conditions necessary for phase mixing are discussed. The simplest two-component configurations with broadband mixing are found, as well as the more complex three-component configurations wherein symmetric and broken sets are not yet mixed and appear in the neighbouring frequency ranges. Peculiarities of eigenvalue behaviour are considered for different permittivity ranges of loss/gain medium, i.e., from epsilon-near-zero to highepsilon regime. © 2017 The Author(s).
      Keywords
      Behavior
      Bilayer membrane
      Electromagnetic radiation
      Polarization
      Optical materials and structures
      Quantum physics
      Permalink
      http://hdl.handle.net/11693/37259
      Published Version (Please cite this version)
      https://doi.org/10.1038/s41598-017-14982-w
      Collections
      • Department of Electrical and Electronics Engineering 3863
      • Department of Physics 2485
      • Institute of Materials Science and Nanotechnology (UNAM) 2098
      • Nanotechnology Research Center (NANOTAM) 1125
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