Cascade upconversion: a strategy enabling four-photon lithography in weak light intensity
Abstract Multiphoton lithography offers the minimum feature size available in submicron scale true 3D printing, but excessive femtosecond laser intensity prevents it from leading to higher photon counts. To circumvent away this effect, we present a cascade upconversion strategy, which is a combinati...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-61533-3 |
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