1. Motivation
The quartz tuning-fork (QTF) is a widely used resonator for sensing applications in scanning probe microscopy (SPM). We demonstrate the Q-control, feedback cooling, and nonlinear dynamics for the quartz tuning-fork by implementing active feedback control scheme. By this work, one can generate the on-demand system by controlling the parameters from the feedback loop. These techniques can apply to the novel measurements in QTF based scanning probe microscopy such as the fast scanning by compressing the decay time of the probe, the tip-sample interaction force spectroscopy by increasing the dynamic range of the resonator, the high resolution scanning by reducing the thermal noise of the oscillator, and the high sensitive sensor by using the nonlinear phase transition.
2. Theory and Experimental Setup
1) Q-control
2) feedback cooling
3) nonlinear dynamics
(1) Duffing Oscillator
(2) Parametric Resonance
3. Results and Discussion
1) Q-control
2) feedback cooling
3) nonlinear dynamics
