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 language | English |
|---|---|
| Pages (from-to) | 2614-2616 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 18 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 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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Cite this
Chu, T., Yamada, H., Gomyo, A., Ushida, J., Ishida, S., & Arakawa, Y. (2006). Tunable optical notch filter realized by shifting the photonic bandgap in a silicon photonic crystal line-defect waveguide. IEEE Photonics Technology Letters, 18(24), 2614-2616. https://doi.org/10.1109/LPT.2006.887366