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Intense multiphoton upconversion of Yb3+-Tm3+ doped β-NaYF4 individual nanocrystals by saturation excitation

  • Jiajia Zhou
  • , Gengxu Chen
  • , Yingbin Zhu
  • , Lili Huo
  • , Wei Mao
  • , Danna Zou
  • , Xinwen Sun
  • , E. Wu
  • , Heping Zeng
  • , Junjie Zhang
  • , Long Zhang
  • , Jianrong Qiu
  • , Shiqing Xu*
  • *此作品的通讯作者
  • China Jiliang University
  • East China Normal University
  • Singapore University of Technology and Design
  • CAS - Shanghai Institute of Optics and Fine Mechanics
  • Zhejiang University

科研成果: 期刊稿件文章同行评审

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
3
2
DOI
出版状态已出版 - 14 1月 2015
已对外发布

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