REGULATION OF A MICROCANTILEVER RESPONSE BY FORCE FEEDBACK
REGULATION OF A MICROCANTILEVER RESPONSE BY FORCE FEEDBACK
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DOI：
10.1063/1.109413
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发表时间：
1993-05-10
影响因子：
4
通讯作者：
MLYNEK, J
中科院分区：
文献类型：
--
作者：
MERTZ, J;MARTI, O;MLYNEK, J
使用反馈机构来控制机械微悬臂梁上的力，作为所监控的悬臂梁运动的函数。通过改变产生热致应力的辅助激光束的强度来实现控制。反馈的设计是为了降低悬臂梁的有效共振品质因数。结果表明，对悬臂运动的调节可以改善原子力显微镜的测量动力学，而不会显著降低信噪比。
A feedback mechanism is used to control the forces incident on a mechanical microcantilever as a function of the monitored cantilever motion. The control is effected by modifying the intensity of an auxiliary laser beam that generates a thermally induced stress. The feedback is designed to reduce the effective resonance quality factor of the cantilever. The resultant regulation of the cantilever motion is shown to improve the measurement dynamics in atomic force microscopy, without significantly degrading the signal to noise ratio.