Damping vibration studies of scanning near-field optical microscope

Terry Yuan-Fang Chen, Haw Long Lee

Research output: Contribution to journalConference articlepeer-review


Scanning near-field optical microscopy (SNOM) is one of the major proximal probe technologies for obtaining high-resolution images beyond the diffraction limit of light and to fabricate nanometer-scale structures. The effect of interactive damping on the flexural vibration frequency for the scanning near-field optical microscope (SNOM) fiber probe based on the Timoshenko beam (including the effects of shear deformation and rotary inertia) theory, has been analyzed. The effects of the transverse contact stiffness, damping factor and the ratio of different probe dimensions on the damping vibration frequency were studied. The results show that increasing the ratio of probe length to radius increases the damping vibration frequency of mode 1. The damping vibration frequencies, based on the Bernoulli-Euler beam theory and the Timoshenko beam theory, are compared. When the contact stiffness is very large for the higher modes, the effects of shear deformation and rotary inertia on the frequency becomes significant. Furthermore, increasing the damping factor increases the vibration frequency, especially for dimensionless damping factor & et alf > 0.4.

Original languageEnglish
Article number71330H
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2009 Mar 23
Event5th International Symposium on Instrumentation Science and Technology - Shenyang, China
Duration: 2009 Sep 152009 Sep 18

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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