Low-loss transmission band in photonic crystal waveguides with sharp cutoff at a frequency below the bandgap

Asger Christian Krüger, Min Zhang, Nathaniel Groothoff, Radu Malureanu, Martin Kristensen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We present TE transmission measurements of photonic crystal waveguides with high hole radius to period ratio r/Λ=0.388. This geometry introduces a unique low loss transmission band in addition to the traditional PhC guiding band and very sharp transmission edges for devices with a length of 50 μm or longer. Finite difference time domain and plane wave expansion simulations confirm the results and show that the sharpness of the cutoffs can be explained by the spectral shape of the guiding mode in the band diagram.
    Original languageEnglish
    JournalOptics Communications
    Volume284
    Issue number23
    Pages (from-to)5434-5439
    ISSN0030-4018
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Integrated optics devices
    • Nanophotonics
    • Photonic crystals
    • Low loss transmission
    • Planar waveguides

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