Optical add-drop multiplexer using PBG with hexagonal-hole lattice PC slab waveguides

Akiko Gomyo, Jun Ushida, Hirohito Yamada, Tao Chu, Satomi Ishida, Yasuhiko Arakawa

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


We report on a channel-drop filter (CDF) with a mode gap of propagating mode for a photonic crystal slab that was fabricated on silicon on an insulator wafer. The results simulated with 3-dimensional finite-difference time-domain and plane-wave methods demonstrated that an index-guiding mode for a line defect waveguide of a photonic crystal slab has a band gap at wave vector k = 0.5 for a mainly TM-like light-wave. The mode gap works as a distributed Bragg grating reflector for the propagating light-wave through the line defect waveguide, and it can be used as an optical filter. The filter bandwidth was varied from 1 - 8 nm with an r/a (r. hole radius, a: lattice constant) variation around the wavelength range of 1550 - 1600 nm. We fabricated a Bragg reflector with a photonic crystal line-defect waveguide and with Si-channel waveguides and obtained results of transmittance abrupt dips that come from the Bragg reflector that were measured in the transmittance spectrum. The experimental results are consistent with our theoretical analysis.

Original languageEnglish
Article number60500B
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2005
EventOptomechatronic Micro/Nano Devices and Components - Sappora, Japan
Duration: 2005 Dec 52005 Dec 7


  • Bragg reflector
  • Channel drop filter
  • Line-defect waveguide
  • Optical add-drop multiplexer
  • Photonic crystal


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