|Efficient light coupling from integrated single-mode waveguides to supercollimating photonic crystals on silicon-on-insulator platforms |
Auteur(s): Vynck Kevin, Centeno Emmanuel, Le vassor d'yerville Marine, Cassagne D.
Ref HAL: hal-00437946_v1
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We propose a practical and efficient solution for the coupling of light from integrated single-mode waveguides to supercollimating planar photonic crystals (PhCs) on conventional silicon-on-insulator platforms. The device consists of a rib waveguide, designed to sustain spatially extended single modes and matched to a supercollimating PhC, which has been truncated at its boundary to improve impedance matching between the two photonic components. Three-dimensional simulations show transmission efficiencies up to 96% and reflections below 0.2% at wavelengths close to 1.55 mu m. This approach constitutes a significant step toward the integration of supercollimating structures on photonic chips. (c) 2008 American Institute of Physics.