Gap maintenance system using near-field optics and piezoelectric materials for near-field recording

Hyuck Dong Kwon, Tae Sun Song, Wan Jin Kim, No Cheol Park, Young Pil Park

Research output: Contribution to journalConference article

Abstract

In this paper, our aim is to develop a system that can not only maintain stable distance under 100nm but also compensate the tilting between a pick-up head and disk surface for near-field recording (NFR), which is known as a key technology for a next generation optical storage. Applying total internal reflection (TIR) to the air gap measurement, we design an optical sensor to measure the gap distances at three points. Stack and bimorph piezoelectric actuators are utilized for high precision control with nanometer resolution. To understand dynamic characteristics of the system, an analytical method for boundary coupled beam model is performed and verified by comparison with the results of the finite element method (FEM).

Original languageEnglish
Pages (from-to)68-77
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4902
DOIs
Publication statusPublished - 2002
EventOptomechatronic Systems III - Stuttgart, Germany
Duration: 2002 Nov 122002 Nov 14

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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