摘要
Saturation excitation of individual nanocrystals represents a powerful strategy to explore unique optical characteristics of luminescent activators. Here we report the intense multiphoton upconversion of β-NaYF4: Yb3+-Tm3+ individual nanocrystals benefiting from the perfect ladder-type electron configuration of Tm3+ under saturation illumination excitation. This leads to a luminescence switching between the emissions from 2-photon upconversion and 4-photon upconversion, which exhibits significantly enhanced luminescence intensity by up to a factor of 70. Such intense multiphoton upconversion may have potential application in super-resolution imaging.
| 源语言 | 英语 |
|---|---|
| 页(从-至) | 364-369 |
| 页数 | 6 |
| 期刊 | Journal of Materials Chemistry C |
| 卷 | 3 |
| 期 | 2 |
| DOI | |
| 出版状态 | 已出版 - 14 1月 2015 |
| 已对外发布 | 是 |
指纹
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