Q-factor optimization of a tuning-fork/fiber sensor for shear-force detection

Morville, Jérô;me; Liu, Jinquan; Callegari, Andrea; Chergui, Majed
February 2005
Applied Physics Letters;2/7/2005, Vol. 86 Issue 6, p064103
Academic Journal
We present the results of an experimental and theoretical study on the optimum design of shear-force sensors, used in scanning probe microscopes. We have optimized a configuration consisting of a tuning-fork/fiber-tip assembly, achieving quality factors (Q) exceeding 8000, and have presented a theoretical analysis of the design wherein the force holding the fiber and fork in contact is provided solely by elastic mechanical deformation, which allows full control of the performance of the system. On this basis, we constructed a high-quality-factor configuration with the fiber glued onto the tuning fork.


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