Coupling of cavities - The way to impose control over their modes

Aliaksandra M. Ivinskaya, Andrei V. Lavrinenko, Andrey A. Sukhorukov, Dzmitry M. Shyroki, Sangwoo Ha, Yuri S. Kivshar

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


    In this work, we demonstrate that the compound mode properties of coupled photonic-crystal cavities can depend critically on the interplay of distance between cavities and their longitudinal shifts. Thus the robust control over the cavity modes can be imposed. The simple coupled-mode theory employed for such systems predicts a peculiar behavior of band dispersion in the slow light regime at the photonic band-edge. In particular, it reveals an interesting effect that the frequency detuning of the fundamental supermodes in the coupled cavities can be reduced down to zero. We anticipate that this property will be generic for side-coupled cavity systems irrespectively of the individual cavity design, e.g. point-defect cavities in a photonic crystal or linear cavities in one-dimensional arrays of elements (rods or holes). We report here about the finite-difference frequency-domain method (FDFD) developed by us to analyze nanocavities with a very high Q-factor. The method is utilized to confirm by simulations the coupled-mode theory predictions. As an example we choose coupled cavities in one-dimensional periodic arrays of holes in dielectric nanowires known also as nanobeams.

    Original languageEnglish
    Title of host publicationPhotonic Crystal Materials and Devices IX
    Publication statusPublished - 2010
    EventPhotonic Crystal Materials and Devices IX - Brussels, Belgium
    Duration: 12 Apr 201015 Apr 2010

    Publication series

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


    ConferencePhotonic Crystal Materials and Devices IX


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