Tapping-mode Tip-sample Distance Control For Near-field Optical
碩士 === 國立中正大學 === 物理研究所 === 86 === A tapping-mode tuning fork force sensing method for near-field scanning opticalmicroscope has been successfully developed. Using tuning fork and normalstraight near-field fiber probe, a simple working mechanismof tapping...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
1998
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| Online Access: | http://ndltd.ncl.edu.tw/handle/93768757366589847356 |
| Summary: | 碩士 === 國立中正大學 === 物理研究所 === 86 === A tapping-mode tuning fork force sensing method for near-field
scanning opticalmicroscope has been successfully developed.
Using tuning fork and normalstraight near-field fiber probe, a
simple working mechanismof tapping-mode was achieved. Asymmetric
construction of mechanical excited tapping-modetuning fork
generates better stability and sensitivity than that in
shearforce mode or other non-optical method. Resultsshowed the
vibration of twotines is out of phase 180 degrees. The attaching
of fiber probe only changesthe Q and resonance frequencyof the
sensing tine slightly. Force curves ofshear force mode and
tapping-mode fiber tip in air or in water demonstratedthat force
interaction of tapping-mode is more sensitive and simplified.
Stable and clear images of 500 nm standard polystyrene spheres
wereobtainedin air or water by this novel method.
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