3 × 3 slot waveguide crossing based on Maxwell’s fisheye lens

@article{Badri201933,
  title={3 × 3 slot waveguide crossing based on Maxwell’s fisheye lens},
  author={Seyed Hadi Badri and Mohsen Mohammadzadeh Gilarlue and Hadi Soofi and Hassan Rasooli Saghai},
  journal={Optical Engineering},
  year={2019},
  volume={58},
  pages={097102 - 097102}
}
Abstract. Intersection of two or more silicon slot waveguides is inevitable in modern optical integrated circuits based on a silicon-on-insulator platform. We design a Maxwell’s fisheye lens as the crossing medium for three Si slot waveguides and numerically investigate its characteristics, such as insertion loss, cross talk, and bandwidth. For the 3  ×  3 slot waveguide crossing, the average insertion loss of 1.2 dB and cross talk levels lower than −15.1  dB are achieved in an ultrawideband… 
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