Stable, sharp-bandwidth and upconverted stimulated emissions are generated from a 5-μm polystyrene cavity pumped by a low-power continuous-wave excitation.
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Lin, G., Jin, D. Taking upconversion to lase in microcavity. Nature Nanotech 13, 534–536 (2018). https://doi.org/10.1038/s41565-018-0191-2
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DOI: https://doi.org/10.1038/s41565-018-0191-2
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