Scientists create tiny lasers from nanoparticles and plastic beads

Nanowerk  December 30, 2019 An international team of researchers (Lawrence Berkeley National Laboratory, UC Berkeley, Columbia University, Italy, Kazakhstan) found that when an infrared laser excites thulium-doped nanoparticles coated on the surface of the beads, the light emitted by the nanoparticles bounces around the inner surface of the bead. When the intensity of light traveling around these beads reaches a certain threshold, the light can stimulate the emission of more light with the exact same color producing intense light at a very narrow range of wavelengths in the beads. When the team exposed the beads to an infrared laser with […]