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

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Abstract

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
Volume97
Issue number22
Pages (from-to)221110
ISSN0003-6951
DOIs
Publication statusPublished - 2010

Bibliographical note

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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