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We present a method for accurate determination of refractive indices of waveguide core and cladding layers using reflective microrings. The resonant mode azimuthal order ambiguity is resolved by introducing a grating on the microrings.
We demonstrate a giant phase-shift in a slow-light Bragg reflector waveguide. A low polarization dependence of group index is clearly shown. We observed a large phase shift over 4p in 20µm-long waveguide thanks to slowing light.
Guided-mode resonance sensors employing modal-polarization diversity are presented. In an application example, we quantify the variations in the refractive index of an attaching biolayer and show that the background is stable.
We design integrated holographic filters with any transfer function by weakly modulating the top cladding of SOI waveguides. Our calculations are confirmed by full-vectorial simulations. Grating are fabricated with focused ion beam.
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