![Laser-Stimulated Luminescence thumbnail](https://opnmedia.blob.core.windows.net/$web/opn/media/images/imageoftheweek/2024/24-03-01.jpg?ext=.jpg)
Laser-Stimulated Luminescence
Emission near green wavelength of NaYF4 codoped with Yr3+/Er3+, stimulated with a 977-nm CW laser. Image captured in the Nano Optics Laboratory of the Federal University of Pernambuco, Recife, Brazil.
—Dayvid Mello, Federal University of Pernambuco, Recife, Brazil