Force detection using a fiber-optic cantilever

Raffi Budakian, Seth J. Putterman

Research output: Contribution to journalArticle

Abstract

A force measurement technique has been developed that utilizes a clamped fiber-optic element both as a cantilever and as a highly sensitive probe of the static and dynamic displacement of a sample that is mounted near its free end. Light from a 1.5 mW superluminescent diode coupled into the fiber is used to detect displacement with 6×10-13m/ Hz sensitivity for frequencies above 40 kHz. This technique has been used to study the interaction between two gold surfaces by simultaneously measuring the interaction force and contact stiffness as a function of the conductance and elongation of the contact. Excellent correspondence between steps in contact stiffness and electrical conductivity was observed.

Original languageEnglish (US)
Pages (from-to)2100-2102
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number11
DOIs
StatePublished - Sep 9 2002

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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