Abstract
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 language | English |
|---|---|
| Pages (from-to) | 11420-11426 |
| Number of pages | 7 |
| Journal | ACS Nano |
| Volume | 7 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 23 Dec 2013 |
Keywords
- amplified spontaneous emission
- microcavity lasers
- up-conversion nanoparticles
- whispering gallery modes
ASJC Scopus subject areas
- General Materials Science
- General Engineering
- General Physics and Astronomy