Cantilever biosensor reader using a common-path, holographic optical interferometer

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We demonstrate an optical reader principle aimed at monitoring biologically induced deflections of microcantilevers often used in biosensor systems. The principle is based on a so-called common-path optical interferometer in which the two interfering optical beams are copropagating,which makes the system less sensitive to external disturbances. A detection limit of around 1 nm’s deflection is demonstrated.
Original languageEnglish
JournalApplied Physics Letters
Issue number22
Pages (from-to)221110
Publication statusPublished - 2010

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Copyright (2010) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.


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