Document Detail

Fluorescent liquid-core/air-cladding waveguides towards integrated optofluidic light sources.
MedLine Citation:
PMID:  18818816     Owner:  NLM     Status:  PubMed-not-MEDLINE    
We have demonstrated fluorescent liquid-core/air-cladding (LA) waveguides suitable for use as integrated optofluidic light sources. These waveguides were fabricated by conventional soft lithography using poly(dimethylsiloxane) (PDMS). Two-phase stratified flows of air and ethylene glycol with fluorescent dye were generated along the PDMS channel. Compared to the liquid-core/liquid-cladding (L(2)) waveguide, the larger refractive index contrast of the LA waveguide resulted in stronger optical confinement. Specifically, the larger refractive index contrast led to experimentally achievable captured fractions (the amount of light to be coupled into the liquid core) as high as 22.8% and the measured propagation losses as low as 0.14 dB cm(-1). Furthermore, in our LA waveguides, diffusional mixing of the core and cladding fluids did not occur and the size of the core stream could be reversibly tuned simply by adjusting the flow rates of the two contiguous phases.
Jong-Min Lim; Se-Heon Kim; Jae-Hoon Choi; Seung-Man Yang
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Publication Detail:
Type:  Journal Article     Date:  2008-07-18
Journal Detail:
Title:  Lab on a chip     Volume:  8     ISSN:  1473-0197     ISO Abbreviation:  Lab Chip     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-09-26     Completed Date:  2008-10-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101128948     Medline TA:  Lab Chip     Country:  England    
Other Details:
Languages:  eng     Pagination:  1580-5     Citation Subset:  -    
Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 305-701, Korea.
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