Abstract
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 language | English (US) |
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Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 6465 |
DOIs | |
State | Published - 2007 |
Event | Microfluidics, BioMEMS, and Medical Microsystems V - San Jose, CA, United States Duration: Jan 22 2007 → Jan 24 2007 |
Other
Other | Microfluidics, BioMEMS, and Medical Microsystems V |
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Country | United States |
City | San Jose, CA |
Period | 1/22/07 → 1/24/07 |
Keywords
- Fluorescence
- Lasing
- MDRs
- Microdroplet
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics