Lasing droplets in a microfluidic T-junction device with integrated optics

Melikhan Tanyeri, Richard Perron, Ian M. Kennedy

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Lasing from spherical microdroplets ejected into a liquid medium with lower refractive index is observed in a microchannel. A microfabricated device that combines the droplet production and excitation/detection has been utilized. Droplets of 50 μm-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 (MDRs) which 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.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2007
EventMicrofluidics, BioMEMS, and Medical Microsystems V - San Jose, CA, United States
Duration: Jan 22 2007Jan 24 2007


OtherMicrofluidics, BioMEMS, and Medical Microsystems V
Country/TerritoryUnited States
CitySan Jose, CA


  • Fluorescence
  • Lasing
  • MDRs
  • Microdroplet

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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