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  • Title: Abrupt coupling between strongly dissimilar waveguides with 100% transmission.
    Author: Kurs A, Joannopoulos JD, Soljačić M, Johnson SG.
    Journal: Opt Express; 2011 Jul 04; 19(14):13714-21. PubMed ID: 21747528.
    Abstract:
    We present numerical experiments showing how coupled-mode theory can be systematically applied to join very dissimilar photonic crystal waveguides with 100% transmission. Our approach relies on appropriately tuning the coupling of the evanescent tail of a cavity mode to each waveguide. The transition region between the waveguides may be as short as a few lattice spacings. Moreover, this technique only requires varying a small number of parameters (two for each waveguide in our example) and the tuning to each waveguide may be done separately, greatly simplifying the computations involved.
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