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Polarization mixing, bound states in a continuum, and exciton-polaritons in photonic crystal slabs by a guided-mode expansion approach

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  • معلومة اضافية
    • بيانات النشر:
      EDP Sciences, 2024.
    • الموضوع:
      2024
    • Collection:
      LCC:Physics
    • نبذة مختصرة :
      Photonic crystal (PhC) slabs, or patterned multilayer waveguides, are known to support truly guided modes with no losses, as well as quasi-guided modes that lie in the continuum of far-field radiation. In this contribution, we present a guided-mode expansion approach – and the corresponding free software named legume – that allows calculating a number of features of PhC slabs: (a) symmetry properties and the issue of polarization mixing in coupling to far-field radiation; (b) the occurence of bound states in a continuum, which have infinite Q-factor and give rise to topological singularities of the far-field polarization; (c) the description of active two-dimensional layers through a suitably formulated light-matter coupling Hamiltonian, allowing to describe the regime of strong coupling leading to photonic crystal polaritons. Comparison with rigorous coupled-wave analysis, and the insurgence of non-hermitian features in the optical properties, are also addressed.
    • File Description:
      electronic resource
    • ISSN:
      2100-014X
    • Relation:
      https://www.epj-conferences.org/articles/epjconf/pdf/2024/19/epjconf_eosam2024_05010.pdf; https://doaj.org/toc/2100-014X
    • الرقم المعرف:
      10.1051/epjconf/202430905010
    • الرقم المعرف:
      edsdoj.bb5481c41420474f804f1d7a8b586fbc