Highly efficient optical filter based on vertically coupled photonic crystal cavity and bus waveguide
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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).
Debnath , K , Welna , K , Ferrera , M , Deasy , K , Lidzey , D G & O'Faolain , L 2013 , ' Highly efficient optical filter based on vertically coupled photonic crystal cavity and bus waveguide ' , Optics Letters , vol. 38 , no. 2 , pp. 154-156 . https://doi.org/10.1364/OL.38.000154
© 2013 Optical Society of America. This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at http://www.opticsinfobase.org