Deep UV random lasing from NaGdF4:Yb3+,Tm3+ upconversion nanocrystals in amorphous borosilicate glass

Xuhui Xu, Wei Lu, Ting Wang, Wei Gao, Xue Yu, Jianbei Qiu, Siu Fung Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


The realization of lanthanide-doped upconversion nanocrystals embedded in a robust and transparent solid medium is highly desired to achieve deep UV (<300 nm) lasing. Here, we fabricate NaGdF4:Yb3+, Tm3+ upconversion nanocrystals inside amorphous borosilicate glass to support ∼290 nm random lasing emission under 980 nm excitation. We found that with careful control of the growth process, which is the key to achieve high-crystallinity nanocrystals, the nanocrystals can suppress defect-related quenching and enhance 1I63H6(6IJ8S7/2) transition of Tm3+ (Gd3+) ions under five-photon absorption excitation so that high optical gain (>45 cm−1) at ∼290 nm can be obtained.

Original languageEnglish
Pages (from-to)3095-3098
Number of pages4
JournalOptics Letters
Issue number11
Publication statusPublished - 1 Jun 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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