Control of cavity modes in coupled periodic waveguides

Andrey A. Sukhorukov, Andrei Lavrinenko, Sangwoo Ha, Yuri S. Kivshar

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


We demonstrate that the modes of coupled cavities created in periodic waveguides can depend critically on the lateral shift between the cavities. In the absence of such shift, the modes feature symmetric or antisymmetric profiles, and their frequency splitting generally increases as the cavities are brought closer. We show that the longitudinal shift enables flexible control over the fundamental modes, which frequency detuning can be reduced down to zero. Our coupled-mode theory analysis reveals an intrinsic link between the mode tuning and the transformation of slow-light dispersion at the photonic band-edge. We illustrate our approach through direct numerical modelling of cavities created in arrays of dielectric rods, nanobeam structures, and two-dimensional photonic-crystal waveguides.
Original languageEnglish
Title of host publicationConference proceedings, TaCoNa-Photonics
PublisherAmerican Institute of Physics
Publication date2009
Publication statusPublished - 2009
Event2nd International workshop on theoretical and computational nanophotonics - Bad Honnef, Germany
Duration: 3 Dec 20095 Dec 2009
Conference number: 2


Workshop2nd International workshop on theoretical and computational nanophotonics
CityBad Honnef


  • photonic bandgap
  • Photonic-crystal


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