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Proceedings Paper

Acoustic control of tip-sample distance for optical near-field microscopy
Author(s): Bernard Cretin; Etienne Farnault
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Paper Abstract

A new tip-distance control based on near-field acoustics is presented. The interaction between a vibrating tip and the sample enables high accuracy estimation of the distance variation (typically better than 1 nm with a fiber tip). The paper describes the physical interaction between vibrating tip and the object, the principle of regulation loop and shows experimental results obtained in the case of an optical fiber tip used in near-field optical microscopy. The proposed technique can be used to image the topography of the sample or to characterize coupling gas or fluid.

Paper Details

Date Published: 18 September 1996
PDF: 7 pages
Proc. SPIE 2782, Optical Inspection and Micromeasurements, (18 September 1996); doi: 10.1117/12.250783
Show Author Affiliations
Bernard Cretin, Univ. de Franche-Comte (France)
Etienne Farnault, Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 2782:
Optical Inspection and Micromeasurements
Christophe Gorecki, Editor(s)

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