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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 4 — Feb. 14, 2011
  • pp: 3290–3296

Carrier and thermal dynamics of silicon photonic resonators at cryogenic temperatures

Wolfram H. P. Pernice, Carsten Schuck, Mo Li, and Hong X. Tang  »View Author Affiliations

Optics Express, Vol. 19, Issue 4, pp. 3290-3296 (2011)

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We describe measurement results of silicon photonic circuits at cryogenic temperatures. The interplay between optically induced heating and free carrier dynamics in nano-photonic ring resonators is investigated at temperatures down to 1.8K. We find that the life-time of free carriers generated by two-photon absorption in silicon waveguides is reduced from 1.9ns at room temperature to less than 100ps below 10K. At the same time the thermal relaxation time is significantly elongated. Our work provides the first cryogenic measurement of ultra-short free-carrier lifetimes in silicon waveguides. The results further indicate that integrated optical chips can be easily thermo-optically stabilized at low temperatures.

© 2011 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Integrated Optics

Original Manuscript: November 1, 2010
Revised Manuscript: January 17, 2011
Manuscript Accepted: January 20, 2011
Published: February 4, 2011

Wolfram H. P. Pernice, Carsten Schuck, Mo Li, and Hong X. Tang, "Carrier and thermal dynamics of silicon photonic resonators at cryogenic temperatures," Opt. Express 19, 3290-3296 (2011)

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