Abstract
An evanescent wave sensor based on liquid waveguide is integrated onto a microfluidic chip. The structure of the liquid waveguide consists of three streams with two low refractive index fluids as cladding layers, which envelop a high refractive index fluid as a core layer along a microchannel. Light is coupled into the core layer, and a detected sample is injected into one cladding layer. The profile of the output light modal power is changed by varying the concentration of the sample. The sensor with a sensitivity of 275 μ m 2 lmol can be used for real-time, low-cost, and label-free measurements in a wide range of applications.
Original language | English |
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Article number | 193901 |
Journal | Applied Physics Letters |
Volume | 93 |
Issue number | 19 |
DOIs | |
Publication status | Published - Jan 2008 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)