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Applied Optics

Applied Optics


  • Vol. 36, Iss. 31 — Nov. 1, 1997
  • pp: 8173–8178

Method for increasing shear-force detection sensitivity with uncoated fiber tips

C. Durkan and I. V. Shvets  »View Author Affiliations

Applied Optics, Vol. 36, Issue 31, pp. 8173-8178 (1997)

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A technique that is easy to implement and sensitive for measuring lateral oscillation amplitudes of optical fibers on the nanometer scale for shear-force microscopy is described. The measurement system analyzed here is based on using the optical fiber tip as a cylindrical lens to focus and deflect a detection beam. It is shown that for our experimental arrangement, this technique is at least 2.5 times as sensitive as merely shadowing the edge of such a beam, as in most commonly used configurations. As a result, oscillation amplitudes of the order of 2–3 nm may easily be measured. An advantage of this system is that absolute vibration amplitudes are easily measured. A simple geometric model is used to describe the operation of the system.

© 1997 Optical Society of America

Original Manuscript: March 11, 1996
Revised Manuscript: January 29, 1997
Published: November 1, 1997

C. Durkan and I. V. Shvets, "Method for increasing shear-force detection sensitivity with uncoated fiber tips," Appl. Opt. 36, 8173-8178 (1997)

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