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Silicon photonics

Nonlinear optics in the mid-infrared

Carefully designed nanophotonic silicon waveguides, when pumped at long wavelengths to avoid inherent losses, are opening the door to useful nonlinear processes in the mid-infrared.

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Figure 1: Comparison of two-photon absorption leading to the generation of free carriers for mid-IR (left) and near-IR (right) pumps.

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Jalali, B. Nonlinear optics in the mid-infrared. Nature Photon 4, 506–508 (2010). https://doi.org/10.1038/nphoton.2010.170

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