The frequency response of a tuning fork intended for shear-force detection on a near-field scanning optical microscopy (NSOM) system has been investigated. In particular, a simplified model based on a coupled harmonic oscillator is presented to qualitatively describe the experimentally observed symmetric and asymmetric resonance behaviors of the tuning fork. We find that the elastic terms of the frequency response can produce a pinning down effect on one side of the main peak, resulting in a suppression of the background noise with a high Q-factor.
|Number of pages||5|
|Journal||Journal of the Korean Physical Society|
|Publication status||Published - 2004 Aug|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)