Waveguides, bends and Y-junctions with improved transmission and bandwidth in hexagon-type SOI photonic crystal slabs

C.G. Bostan, R.M. de Ridder, H. Kelderman, A. Driessen

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    This paper presents novel ways of implementing waveguide components in photonic crystal slabs based on silicon-on-insulator (SOI). The integration platform we consider consists of hexa¬gonal holes arranged in a triangular lattice (‘hexagon-type’ photonic crystal). The waveguides are made of one missing row of holes (W1) with triangular air inclusions symmetrically added on each side of the waveguide. Size and position of these inclusions are tuning parameters for the band diagram and can be used for minimizing the distributed Bragg reflection (DBR) effect. The waveguides show single-mode behavior with reasonably high group velocity and large transmission window, inside the gap between H-like modes**. These waveguides, closely resembling conventional ridge waveguides, can be combined to form efficient bends and Y-junctions. The bends and Y-junctions include intermediate short waveguide sections at half the bend angle playing the role of corner ‘mirrors’. Qualitative design rules were obtained from 2D calculations based on effective index approximation.
    Original languageUndefined
    Title of host publicationAdvanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies II
    EditorsO. Lancu, A. Manea, P. Schiopu, D. Cojoc
    Place of PublicationBellingham, Washington, USA
    PublisherSPIE - The International Society for Optical Engineering
    Number of pages8
    ISBN (Print)0-8194-5991-7
    Publication statusPublished - 2005
    EventConference on Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies II: Proceedings of SPIE, Conference on Advanced Topics in Optoeelectronics, Microelectronics and Nanotechnologies II - Bucharest, Romania
    Duration: 24 Nov 200426 Nov 2004

    Publication series

    NameProceedings of SPIE
    PublisherSPIE-The International Society for Optical Engineering
    ISSN (Print)0277-786X


    ConferenceConference on Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies II
    CityBucharest, Romania


    • IR-65582
    • METIS-227943
    • EWI-1919

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