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Integrated optical readout for miniaturization of cantilever-based sensor system

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5 Author(s)
Nordstrom, Maria ; MIC-Department of Micro and Nanotechnology, Nano DTU, Technical University of Denmark, Bldg. 345 East, DK-2800 Kongens Lyngby, Denmark ; Zauner, Dan A. ; Calleja, Montserrat ; Hübner, J.
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Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.2779851 

The authors present the fabrication and characterization of an integrated optical readout scheme based on single-mode waveguides for cantilever-based sensors. The cantilever bending is read out by monitoring changes in the optical intensity of light transmitted through the cantilever that also acts as a waveguide. The complete system is fabricated in the photosensitive polymer SU-8. They show theoretical calculations on the expected sensitivity both when operated in air and liquid and compare these with experimental characterization of the system in air where the cantilever is deflected mechanically. The experimental results compare well with the results obtained from the theoretical calculations.

Published in:
Applied Physics Letters  (Volume:91 ,  Issue: 10 )

Date of Publication: Sep 2007

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