Interference effect in scattering loss of high-index-contrast planar waveguides caused by boundary reflections Academic Article uri icon

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abstract

  • We present theoretical and experimental results on an interference effect caused by boundary reflections on the optical scattering loss in high-index-contrast planar waveguides. Analytical expressions for the polarization-dependent scattering loss are derived using a surface Green's function. For high-index-contrast waveguides of submicrometer dimensions a significant deviation from accepted theory arises, including scattering loss suppression owing to a thin-film interference effect. Our theoretical predictions are confirmed by loss measurements on silicon-on-insulator channel waveguides.

authors

  • Schmid, Jens
  • Delâge, André
  • Lamontagne, Boris
  • Lapointe, Jean
  • Janz, S
  • Cheben, Pavel
  • Densmore, Adam
  • Waldron, Philip
  • Xu, DanXia
  • P Yap, K

publication date

  • August 2018