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Related Experiment Video

Updated: May 18, 2026

Fabrication of Silica Ultra High Quality Factor Microresonators
07:51

Fabrication of Silica Ultra High Quality Factor Microresonators

Published on: July 2, 2012

Ultra-compact, high-Q silicon microdisk reflectors.

Wei Shi1, Han Yun, Wen Zhang

  • 1Department of Electrical and Computer Engineering, the University of British Columbia, Vancouver, BC, Canada. weis@ece.ubc.ca

Optics Express
|October 6, 2012
PubMed
Summary
This summary is machine-generated.

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We developed compact silicon microdisk resonators for wavelength-selective reflection. These devices offer high quality factors and wide free-spectral ranges, enabling potential applications in multichannel sensing systems.

Area of Science:

  • Photonics and optical engineering
  • Materials science and nanotechnology

Background:

  • Silicon microdisk resonators are key components in integrated photonics.
  • Achieving high quality factors (Q) and wide free-spectral ranges (FSR) simultaneously is challenging.

Purpose of the Study:

  • To demonstrate wavelength-selective reflectors using silicon microdisk resonators.
  • To investigate the trade-offs between Q-factor, footprint, and FSR.
  • To propose a multichannel sensing system based on these reflectors.

Main Methods:

  • Fabrication of silicon microdisk resonators with Y-branch splitters using CMOS-photonics technology.
  • Characterization of reflection spectra to measure Q-factor and FSR.
  • Numerical investigation of microdisk-waveguide coupling.

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Last Updated: May 18, 2026

Fabrication of Silica Ultra High Quality Factor Microresonators
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Published on: July 2, 2012

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Main Results:

  • Demonstrated wavelength-selective reflectors with a small footprint (6 × 17 μm²).
  • Achieved a high Q-factor of ~88,000 and an FSR of over 41 nm for a 2.5-μm radius device.
  • Observed an ultra-wide FSR of over 71 nm for a 1.5-μm radius device, with a Q-factor of ~4000.

Conclusions:

  • Silicon microdisk resonators can be engineered for specific optical filtering characteristics.
  • Device radius is a critical parameter influencing Q-factor, footprint, and FSR.
  • Cascaded microdisk reflectors offer a promising platform for multichannel sensing applications.