Optical and Quantum Electronics

, Volume 37, Issue 1, pp 331–341

Numerical characterization of nanopillar photonic crystal waveguides and directional couplers

Authors

  • Dmitry N. Chigrin
    • Institute of PhysicsUniversity of Bonn
    • Research Center COMTechnical University of Denmark
  • Clivia M. Sotomayor Torres
    • NMRCUniversity College Cork
Article

DOI: 10.1007/s11082-005-1189-1

Cite this article as:
Chigrin, D.N., Lavrinenko, A.V. & Torres, C.M.S. Opt Quant Electron (2005) 37: 331. doi:10.1007/s11082-005-1189-1

Abstract

We numerically characterize a novel type of a photonic crystal waveguide, which consists of several rows of periodically arranged dielectric cylinders. In such a nanopillar photonic crystal waveguide, light confinement is due to the total internal reflection. A nanopillar waveguide is a multimode waveguide, where the number of modes is equal to the number of rows building the waveguide. The strong coupling between individual waveguides leads to the proposal of an ultrashort directional coupler based on nanopillar waveguides. We present a systematic analysis of the dispersion and transmission efficiency of nanopillar photonic crystal waveguides and directional couplers. Plane wave expansion and finite difference time domain methods were used to characterize numerically nanopillar photonic crystal structures both in two- and three-dimensional spaces.

Key words

directional couplersnanoscale photonicsphotonic crystal waveguidestransmission
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Copyright information

© Springer 2005