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Thermally tunable silicon racetrack resonators with ultralow tuning power.

Authors
  • Dong, Po
  • Qian, Wei
  • Liang, Hong
  • Shafiiha, Roshanak
  • Feng, Dazeng
  • Li, Guoliang
  • Cunningham, John E
  • Krishnamoorthy, Ashok V
  • Asghari, Mehdi
Type
Published Article
Journal
Optics Express
Publisher
The Optical Society
Publication Date
Sep 13, 2010
Volume
18
Issue
19
Pages
20298–20304
Identifiers
DOI: 10.1364/OE.18.020298
PMID: 20940921
Source
Medline
License
Unknown

Abstract

We present thermally tunable silicon racetrack resonators with an ultralow tuning power of 2.4 mW per free spectral range. The use of free-standing silicon racetrack resonators with undercut structures significantly enhances the tuning efficiency, with one order of magnitude improvement of that for previously demonstrated thermo-optic devices without undercuts. The 10%-90% switching time is demonstrated to be ~170 µs. Such low-power tunable micro-resonators are particularly useful as multiplexing devices and wavelength-tunable silicon microcavity modulators.

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