Lasing droplets in a microfabricated channel.
- 17 August 2007
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 32 (17), 2529-2531
- https://doi.org/10.1364/ol.32.002529
Abstract
Lasing from spherical microdroplets ejected into a liquid medium with a lower refractive index is observed in a microchannel. A microfabricated device that combines droplet production and excitation/detection has been utilized. Droplets of diameter containing a fluorescent dye were first detected and then excited through multimode fibers after their production at a T-junction. Images show intense lasing emission around the droplet rim. Spectra from the droplets exhibit morphology-dependent resonances that are redshifted relative to the bulk fluorescence emission from the dyes. The dependence of resonant peak intensities on the pump beam power is nonlinear.