title: Highly efficient optical filter based on vertically coupled photonic crystal cavity and bus waveguide.
abstract: We experimentally demonstrate a new optical filter design based on a vertically coupled photonic crystal (PhC) cavity and a bus waveguide monolithically integrated on the silicon-on-insulator platform. The use of a vertically coupled waveguide gives flexibility in the choice of the waveguide material and dimensions, dramatically lowering the insertion loss while achieving very high coupling efficiencies to wavelength scale resonators and thus allows the creation of PhC-based optical filters with very high extinction ratio (>10 dB).
authors: School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, UK. kd343@st‑andrews.ac.uk
authors: Kapil
authors: K
authors: Debnath
authors: Karl
authors: K
authors: Welna
authors: Marcello
authors: M
authors: Ferrera
authors: Kieran
authors: K
authors: Deasy
authors: David G
authors: DG
authors: Lidzey
authors: Liam
authors: L
authors: O'Faolain