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

doi:10.1117/12.467534

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

Department of Mechanical Engineering

Research output: Contribution to journal › Conference 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 language	English
Pages (from-to)	68-77
Number of pages	10
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4902
DOIs	https://doi.org/10.1117/12.467534
Publication status	Published - 2002
Event	Optomechatronic Systems III - Stuttgart, Germany Duration: 2002 Nov 12 → 2002 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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Kwon, H. D., Song, T. S., Kim, W. J., Park, N. C., & Park, Y. P. (2002). Gap maintenance system using near-field optics and piezoelectric materials for near-field recording. Proceedings of SPIE - The International Society for Optical Engineering, 4902, 68-77. https://doi.org/10.1117/12.467534

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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).",

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AU - Park, Young Pil

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AB - 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).

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