Directly relating the complex second-harmonic-generation field to the second-order susceptibility tensor allows tomographic imaging of nonlinear optical contrast at high frame rates.
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Campagnola, P.J. High-speed 3D mapping of nonlinear structures. Nat. Photonics 14, 531–532 (2020). https://doi.org/10.1038/s41566-020-0683-0
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DOI: https://doi.org/10.1038/s41566-020-0683-0
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