Temperature-independent silicon subwavelength grating waveguides Academic Article uri icon

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abstract

  • We demonstrate, by experiment and numerical calculations, temperature-independent subwavelength grating waveguides with a periodic composite core composed of alternating regions of silicon and SU-8 polymer. The polymer has a negative thermo-optic (TO) material coefficient that cancels the large positive TO effect of the silicon. Measurements and Bloch mode calculations were carried out over a range of silicon-polymer duty ratios. The lowest measured TO coefficient at a wavelength of 1550 nm is 1.8×10(-6) K(-1); 2 orders of magnitude smaller than a conventional silicon photonic wire waveguide. Calculations predict the possibility of complete cancellation of the silicon waveguide temperature dependence.

authors

  • Schmid, JH
  • Ibrahim, M
  • Cheben, Pavel
  • Lapointe, J
  • Janz, S
  • Bock, PJ
  • Densmore, A
  • Lamontagne, B
  • Ma, R
  • Ye, WN
  • Xu, D-X

publication date

  • June 1, 2011