Journal
OPTICS LETTERS
Volume 32, Issue 17, Pages 2529-2531Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.32.002529
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- NIEHS NIH HHS [5 P42 ES04699] Funding Source: Medline
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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 50 mu m 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 red-shifted relative to the bulk fluorescence emission from the dyes. The dependence of resonant peak intensities on the pump beam power is nonlinear. (c) 2007 Optical Society of America.
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