---
res:
  bibo_abstract:
  - "The 3D implementation of a hybrid analytical/numerical variant of the coupled-mode
    theory is discussed.\r\nEigenmodes of the constituting dielectric channels are
    computed numerically. The frequency-domain\r\ncoupled-mode models then combine
    these into fully vectorial approximations for the optical electromagnetic\r\nfields
    of the composite structure. Following a discretization of amplitude functions
    by 1D finite elements, pro-\r\ncedures from the realm of finite-element numerics
    are applied to establish systems of linear equations for the then-\r\ndiscrete
    modal amplitudes. Examples substantiate the functioning of the technique and allow
    for some numerical\r\nassessment. The full 3D simulations are highly efficient
    in memory consumption, moderately demanding in com-\r\nputational time, and, in
    regimes of low radiative losses, sufficiently accurate for practical design. Our
    results\r\ninclude the perturbation of guided modes by changes of the refractive
    indices, the interaction of waves in parallel,\r\nhorizontally or vertically coupled
    straight waveguides, and a series of crossings of potentially overlapping channels\r\nwith
    fairly arbitrary relative positions and orientations.@eng"
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Manfred
      foaf_name: Hammer, Manfred
      foaf_surname: Hammer
      foaf_workInfoHomepage: http://www.librecat.org/personId=48077
    orcid: 0000-0002-6331-9348
  - foaf_Person:
      foaf_givenName: Samer
      foaf_name: Alhaddad, Samer
      foaf_surname: Alhaddad
  - foaf_Person:
      foaf_givenName: Jens
      foaf_name: Förstner, Jens
      foaf_surname: Förstner
      foaf_workInfoHomepage: http://www.librecat.org/personId=158
    orcid: 0000-0001-7059-9862
  bibo_doi: 10.1364/josab.34.000613
  bibo_issue: '3'
  bibo_volume: 34
  dct_date: 2017^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0740-3224
  - http://id.crossref.org/issn/1520-8540
  dct_language: eng
  dct_publisher: The Optical Society@
  dct_subject:
  - tet_topic_waveguide
  - tet_topic_numerics
  dct_title: 'Hybrid coupled-mode modeling in 3D: perturbed and coupled channels,
    and waveguide crossings@'
...