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Photonic crystal waveguides: out-of-plane losses and adiabatic modal conversion

Mirel Palamaru 1 Philippe Lalanne 1
1 Laboratoire Charles Fabry de l'Institut d'Optique / Naphel
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
Abstract : An accurate model for the out-of-plane radiation losses occurring when a guided wave propagating in a conventional waveguide impinges on a photonic crystal waveguide is presented. The model makes clear that the losses originate from insertion losses resulting from a mode mismatch. A generic taper structure realizing an adiabatic modal conversion is proposed and validated through numerical computations for cavities with large Q's and large peak transmission.
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Mirel Palamaru, Philippe Lalanne. Photonic crystal waveguides: out-of-plane losses and adiabatic modal conversion. Applied Physics Letters, American Institute of Physics, 2001, 78 (11), pp.1466-1468. ⟨hal-00859065⟩

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