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2013-03-25 - Article/Dans un journal avec peer-review - Anglais - 13 page(s)

Maes Bjorn , Petracek Jiri, Burger Sven, Kwiecien Pavel, Luksch Jaroslav, Richter Ivan, "Simulations of high-Q optical nanocavities with a gradual 1D bandgap" in Optics Express, 21, 6, 6794, 6806

  • Edition : Optical Society of America, Washington (DC)
  • Codes CREF : Matériaux optiques (DI1256)
  • Unités de recherche UMONS : Matériaux Micro- et Nanophotoniques (S803)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
  • Centres UMONS : Physique des matériaux (CRPM)

Abstract(s) :

(Anglais) High-quality cavities in hybrid material systems have various interesting applications.We perform a comprehensive modeling comparison on such a design, where confinement in the III-V material is provided by gradual photonic crystal tuning, a recently proposed method offering strong resonances. The III-V cavity couples to an underlying silicon waveguide. We report on the device properties using four simulation methods: finite-difference time-domain (FDTD), finite-element method (FEM), bidirectional eigenmode propagation (BEP) and aperiodic rigorous coupled wave analysis (aRCWA). We explain the major confinement and coupling effects, consistent with the simulation results. E.g. for strong waveguide coupling, we find quantitative discrepancies between the methods, which establishes the proposed high-index-contrast, lossy, 3D structure as a challenging modeling benchmark.