Tunable optical notch filter realized by shifting the photonic bandgap in a silicon photonic crystal line-defect waveguide

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

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A tunable optical notch filter was realized by thermally shifting the TM-like (the light's electric field perpendicular to the substrate) bandgap of a silicon photonic crystal slab W1 line-defect waveguide with silica cladding. This device is compact-its footprint is 340 ×16 μm2, excluding the electrode pads. The 3-dB bandwidth of the device was about 5 nm, and the extinction ratio at the center wavelength was as high as 40 dB. A maximum center wavelength shift of 17.9 nm was attained at a heating power of 0.7 W, with a tuning efficiency of 25.5 nm/W. The tuning response time was less than 100 μs.

Original languageEnglish
Pages (from-to)2614-2616
Number of pages3
JournalIEEE Photonics Technology Letters
Volume18
Issue number24
DOIs
Publication statusPublished - 2006 Dec 15

Keywords

  • Integrated optics
  • Optical filters
  • Optical waveguides
  • Photonic crystals (PhCs)
  • Thermooptic effects
  • Tunable filters

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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