Integrated waveguide with a microfluidic channel in spiral geometry for spectroscopic applications

Linan Jiang; Stanley Pau

doi:10.1063/1.2713356

Integrated waveguide with a microfluidic channel in spiral geometry for spectroscopic applications

Research output: Contribution to journal › Article › peer-review

Abstract

The authors fabricated and tested a compact optical sensor with an integrated waveguide and a microchannel in spiral geometry. The multimode waveguide, consisting of an SU-8 core of 40 μm thick and 50 μm wide and a fluid cladding layer of 60 μm thick, realizes a light-fluid interaction length of 110 mm within a device area of 4 cm2. The waveguide sensor measures changes in liquid sample concentration and is sensitive to changes in liquid refractive index. Absorbance measurements using the spiral waveguide sensor demonstrate increased sensitivity compared with a linear geometry sensor.

Original language	English (US)
Article number	111108
Journal	Applied Physics Letters
Volume	90
Issue number	11
DOIs	https://doi.org/10.1063/1.2713356
State	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2713356

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title = "Integrated waveguide with a microfluidic channel in spiral geometry for spectroscopic applications",

abstract = "The authors fabricated and tested a compact optical sensor with an integrated waveguide and a microchannel in spiral geometry. The multimode waveguide, consisting of an SU-8 core of 40 μm thick and 50 μm wide and a fluid cladding layer of 60 μm thick, realizes a light-fluid interaction length of 110 mm within a device area of 4 cm2. The waveguide sensor measures changes in liquid sample concentration and is sensitive to changes in liquid refractive index. Absorbance measurements using the spiral waveguide sensor demonstrate increased sensitivity compared with a linear geometry sensor.",

author = "Linan Jiang and Stanley Pau",

year = "2007",

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AB - The authors fabricated and tested a compact optical sensor with an integrated waveguide and a microchannel in spiral geometry. The multimode waveguide, consisting of an SU-8 core of 40 μm thick and 50 μm wide and a fluid cladding layer of 60 μm thick, realizes a light-fluid interaction length of 110 mm within a device area of 4 cm2. The waveguide sensor measures changes in liquid sample concentration and is sensitive to changes in liquid refractive index. Absorbance measurements using the spiral waveguide sensor demonstrate increased sensitivity compared with a linear geometry sensor.

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Integrated waveguide with a microfluidic channel in spiral geometry for spectroscopic applications

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