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

Hyuck-Dong Kwon; TaeSun Song; Wan-Jin Kim; No-Cheol Park; Young-Pil Park

doi:10.1117/12.467534

18 October 2002 Gap maintenance system using near-field optics and piezoelectric materials for near-field recording

Hyuck-Dong Kwon, TaeSun Song, Wan-Jin Kim, No-Cheol Park, Young-Pil Park

Proceedings Volume 4902, Optomechatronic Systems III; (2002) https://doi.org/10.1117/12.467534
Event: Optomechatronic Systems III, 2002, Stuttgart, Germany

Abstract

In this paper, our aim is to develop a system that can not only maintain stable gap 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).

Citation Download Citation

Hyuck-Dong Kwon, TaeSun Song, Wan-Jin Kim, No-Cheol Park, and Young-Pil Park "Gap maintenance system using near-field optics and piezoelectric materials for near-field recording", Proc. SPIE 4902, Optomechatronic Systems III, (18 October 2002); https://doi.org/10.1117/12.467534

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