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Characterization of mid-infrared silicon-on-sapphire microring resonators with thermal tuning

  • Chi Yan Wong*
  • , Zhenzhou Cheng
  • , Xia Chen
  • , Ke Xu
  • , Christy K.Y. Fung
  • , Yi Min Chen
  • , Hon Ki Tsang
  • *Corresponding author for this work
  • Chinese University of Hong Kong

Research output: Contribution to journalArticlepeer-review

Abstract

Microring resonators on silicon-on-sapphire (SOS) were characterized at 2.75 μm wavelength. We obtained a Q factor of 11400 ± 800. The thermo-optic coefficient of epitaxial silicon of SOS wafer was measured to be 2.11 ± 0.08 × 10 -4 K -1. We also describe a characterization technique to measure the Q of microring resonators using a fixed wavelength source. By only varying the temperature of the device, it is possible to measure the Q of a mid-infrared (mid-IR) microresonator. The proposed method provides an alternative method of Q measurement for microring resonators in mid-IR, where tunable lasers may not be easily available. The technique was used to determine the Q of SOS microring resonators at 2.75 μm wavelength.

Original languageEnglish
Article number6217267
Pages (from-to)1095-1102
Number of pages8
JournalIEEE Photonics Journal
Volume4
Issue number4
DOIs
StatePublished - 2012
Externally publishedYes

Keywords

  • Integrated nanophotonic systems
  • mid-infrared (mid-IR)
  • silicon nanophotonics
  • silicon-on-sapphire (SOS)
  • temperature
  • waveguide devices

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