White-Light Whispering-Gallery-Mode Lasing from Lanthanide-Doped Upconversion NaYF4Hexagonal Microrods

Ting Wang, Huan Yu, Chun Kit Siu, Jianbei Qiu, Xuhui Xu, Siu Fung Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

48 Citations (Scopus)


We demonstrate simultaneous red, green, and blue emission from a Yb3+-Er3+-Tm3+tridoped hexagonal β-NaYF4microrod, which supports whispering-gallery-mode (WGM) resonance, to realize white-light lasing under near-infrared excitation at room temperature. This can be done by optimizing the upconversion efficiency and emission intensity balance of the blue, green, and red peaks through the proper tuning of sensitizer (Yb3+) and activator (Er3+, Tm3+) concentration in the host matrix. In addition, we minimize the difference of lasing threshold and maintain stable single-mode operation to achieve simultaneous red, green, and blue lasing by optimizing the radius of the hexagonal microrods.
Original languageEnglish
Pages (from-to)1539-1543
Number of pages5
JournalACS Photonics
Issue number6
Publication statusPublished - 21 Jun 2017


  • lanthanide ions
  • NaYF hexagonal microrods 4
  • upconversion emission
  • whispering gallery mode
  • white-light lasing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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