Co-doping ytterbium and praseodymium ions in photon avalanche nanoparticles rapidly builds up huge optical nonlinearities, enabling confocal microscopy to achieve super-resolution imaging at high speed.
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Photoinduced photon avalanche turns white objects into bright blackbodies
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Chen, C., Jin, D. Giant nonlinearity in upconversion nanoparticles. Nat. Photon. 16, 553–554 (2022). https://doi.org/10.1038/s41566-022-01043-6
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DOI: https://doi.org/10.1038/s41566-022-01043-6
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Photoinduced photon avalanche turns white objects into bright blackbodies
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