Investigation of optical nonlinearities in an ultra-high-Q Si nanocavity in a two-dimensional photonic crystal slab.

@article{Uesugi2006InvestigationOO,
  title={Investigation of optical nonlinearities in an ultra-high-Q Si nanocavity in a two-dimensional photonic crystal slab.},
  author={Toshitsugu Uesugi and Bong-Shik Song and Takashi Asano and Susumu Noda},
  journal={Optics express},
  year={2006},
  volume={14 1},
  pages={377-86}
}
We investigated the characteristics of an ultra-high-Q photonic nanocavity (Q = ~230,000 and modal volume = ~1.2 cubic wavelengths) at various input light powers. The cavity characteristics were red-shifted as the input power increased. This nonlinearity could be explained by coupled-mode theory, taking into account two-photon absorption, the associated free-carrier absorption, consequent free-carrier absorption, plasma effect, thermo-optic effect, and a Kerr effect. Nonlinear cavity… CONTINUE READING
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