Two-Dimentional Photonic Crystal Waveguides

Thomas Søndergaard, Kim Dridi

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch


    In the recent years a new class of periodic high-index contrast dielectric structures, known as photonic bandgap structures, has been discovered. In these structures frequency intervals, known as photonic bandgaps, where propagation of electromagnetic waves is not allowed, exist due to the periodic dielectric function. This is analogous to semiconductors, where electronic bandgaps exist due to the periodic arrangement of atoms. As is also the case for semiconductor structures, photonic bandgap structures may become of even greater value when defects are introduced. In particular, point defects make possible a novel class of optical microcavities, whereas line defects make possible a novel class of waveguides. In this paper we will analyze two-dimensional photonic crystal waveguides based on photonic crystals with rods arranged on a triangular and a square lattice using a plane-wave expansion method and a finite-difference-time-domain (FDTD) method. Design parameters, i.e. dielectric constants, rod diameter and waveguide width, where these waveguides are single-moded and multi-moded will be given. We will also show our recent results regarding the energy-flow (the Poynting vector) in these waveguides for guided modes.
    Original languageEnglish
    Title of host publicationProceedings of DOPS annual meeting 99
    Number of pages29
    Publication date1999
    Publication statusPublished - 1999
    EventDOPS annual meeting 1999 - Lyngby, Denmark
    Duration: 1 Jan 1999 → …


    ConferenceDOPS annual meeting 1999
    CityLyngby, Denmark
    Period01/01/1999 → …

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