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by z2h-a6n
838 days ago
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It's not discussed in the linked article, but the paper it's based on argues against second harmonic generation and in favor of a two photon absorbtion process [1]. I'm not enough of an expert to comment on the rest of what you said, but I think I agree (based on skimming the paper) that the process still requires a high photon flux (i.e. high power desity). [1]: https://www.pnas.org/doi/full/10.1073/pnas.1410162111 ; See second paragraph, and/or search the text for "SHG". |
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