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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 18931–18936

An integrated tunable interferometer controlled by liquid diffusion in polydimethylsiloxane

Yun Zou, Zhenhua Shen, Xiang Chen, Ziyun Di, and Xianfeng Chen  »View Author Affiliations

Optics Express, Vol. 20, Issue 17, pp. 18931-18936 (2012)

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We demonstrated an integrated tunable interferometer in Polydimethylsiloxane (PDMS). In contrast to most on-chip interferometers which require complex fabrication, our design is realized by conventional soft lithography fabrication. The optical path difference occurs during propagation across a fluid-fluid interface. The diffusion level of the two miscible liquids which is controlled by liquid flow rates provides tunability. Different ratio of two liquid flow rates result in the interference spectral shift. Interference peak numbers are varied with flow rate ratio of two liquids. Mutual diffusion between two liquids changes the profile of the refractive index across the fluidic channel. The two arms structure of our design provides convenience for sensing and detection in biology system. This device not only offers the convenience for microfluidic networks but also paves the way for sensing in chemical microreactors.

© 2012 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(160.5470) Materials : Polymers
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Integrated Optics

Original Manuscript: June 4, 2012
Revised Manuscript: July 23, 2012
Manuscript Accepted: July 23, 2012
Published: August 2, 2012

Virtual Issues
Vol. 7, Iss. 10 Virtual Journal for Biomedical Optics

Yun Zou, Zhenhua Shen, Xiang Chen, Ziyun Di, and Xianfeng Chen, "An integrated tunable interferometer controlled by liquid diffusion in polydimethylsiloxane," Opt. Express 20, 18931-18936 (2012)

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