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Deterministic tuning of slow-light in photonic-crystal waveguides through the C and L bands by atomic layer deposition

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      Abstract

      We demonstrate digital tuning of the slow-light regime in silicon photonic-crystal waveguides by performing atomic layer deposition of hafnium oxide. The high group-index regime was deterministically controlled (red-shift of 140 +/- 10 pm per atomic layer) without affecting the group-velocity dispersion and third-order dispersion. Additionally, differential tuning of 110 +/- 30 pm per monolayer of the slow-light TE-like and TM-like modes was observed. This passive post-fabrication process has potential applications including the tuning of chip-scale optical interconnects, as well as Raman and parametric amplification.

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      Journal
      04 December 2009
      0912.0788 10.1063/1.3308492

      http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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      14 pages, 5 figures
      physics.optics

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