title: Simulations of high-Q optical nanocavities with a gradual 1D bandgap.
abstract: 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.
authors.affiliation: Micro- and Nanophotonic Materials Group, University of Mons, Faculty of Science, Place du Parc 20, B-7000 Mons, Belgium. bjorn.maes@umons.ac.be
authors.forename: Bjorn
authors.initials: B
authors.lastname: Maes
authors.forename: Jiří
authors.initials: J
authors.lastname: Petráček
authors.forename: Sven
authors.initials: S
authors.lastname: Burger
authors.forename: Pavel
authors.initials: P
authors.lastname: Kwiecien
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Luksch
authors.forename: Ivan
authors.initials: I
authors.lastname: Richter
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D036103:Nanotechnology / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*