SOI Photonic Crystal Slab Having 2D PBG

SOI (Silicon-On-Insulator) substrate

PBG Waveguide

  • Single-mode optical waveguides that operate within PBG

  • Extremely large group dispersion of PBG waveguides

  • Group velocity dispersion (in other words, dispersion of the traveling speed of the light) is largely controllable in photonic crystal waveguides.
  • We observed
    • extremely large group velocity dispersion
    • extremely large group index (n>90), meaning that the light velocity is slowed down to 1/100 c!