Abstract
We present an easy-to-use non-optical shear-force detection system for tip–sample distance control in scanning near-field optical microscopes. The fibre tip is fixed in a four-segmented piezo-tube by a polymer, Polyisobutylene, which couples the tip stiffly to the piezo at frequencies of 10 kHz or more at room temperature. One segment of the piezo-tube excites the fibre tip in resonance, while the other three segments detect the tip vibration in the manner of a piezo-microphone. When the tip is damped by shear forces the induced voltage at the three segments changes and can easily be detected with a lock-in amplifier. Further our method allows a fast and reproducible tip exchange with minor adjustments of mechanical or electrical components. We demonstrate the performance of our distance control on a holographically fabricated line pattern with 417 nm lattice spacing and 10 nm height. A height resolution of better than 1 nm is demonstrated.
References
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Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 8:03 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 11, 2024, 12:52 a.m.) |
Indexed | 1 year, 6 months ago (Feb. 11, 2024, 1:10 a.m.) |
Issued | 29 years, 3 months ago (May 1, 1996) |
Published | 29 years, 3 months ago (May 1, 1996) |
Published Print | 29 years, 3 months ago (May 1, 1996) |
@article{Barenz_1996, title={An easy-to-use non-optical shear-force distance control for near-field optical microscopes}, volume={67}, ISSN={1089-7623}, url={http://dx.doi.org/10.1063/1.1146995}, DOI={10.1063/1.1146995}, number={5}, journal={Review of Scientific Instruments}, publisher={AIP Publishing}, author={Barenz, J. and Hollricher, O. and Marti, O.}, year={1996}, month=may, pages={1912–1916} }