Amplified spontaneous emission and lasing from lanthanide-doped up-conversion nanocrystals

Hai Zhu, Xian Chen, Li Min Jin, Qi Jie Wang, Feng Wang, Siu Fung Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

119 Citations (Scopus)


Lanthanide-doped nanocrystals (NCs), which found applications in bioimaging and labeling, have recently demonstrated significant improvement in up-conversion efficiency. Here, we report the first up-conversion multicolor microcavity lasers by using NaYF4:Yb/Er@NaYF4core-shell NCs as the gain medium. It is shown that the optical gain of the NCs, which arises from the 2- and 3-photon up-conversion processes, can be maximized via sequential pulses pumping. Amplified spontaneous emission is observed from a Fabry-Perot cavity containing the NCs dispersed in cyclohexane solution. By coating a drop of silica resin containing the NCs onto an optical fiber, a microcavity with a bottle-like geometry is fabricated. It is demonstrated that the microcavity supports lasing emission through the formation of whispering gallery modes.
Original languageEnglish
Pages (from-to)11420-11426
Number of pages7
JournalACS Nano
Issue number12
Publication statusPublished - 23 Dec 2013


  • amplified spontaneous emission
  • microcavity lasers
  • up-conversion nanoparticles
  • whispering gallery modes

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy


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