A liquid waveguide based evanescent wave sensor integrated onto a microfluidic chip

作者：Li X C^*; Wu J; Liu A Q; Li Z G; Soew Y C; Huang H J; Xu K; Lin J T

来源：Applied Physics Letters, 2008, 93(19): 193901.

DOI：10.1063/1.2988648

• claddings
• fibre optic sensors
• microfluidics
• micro-optomechanical devices
• optical waveguides
• refractive index

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 mu m(2) l/mol can be used for real-time, low-cost, and label-free measurements in a wide range of applications.

• 出版日期2008-11-10
• 单位北京邮电大学; 南阳理工学院