Improvement of scanning speed in NSOM-based data storage device

Sung-Q Lee; Ki-Bong Song; Eun-Kyung Kim; Jun-Ho Kim; Kang-Ho Park

doi:10.1117/12.515009

30 September 2003 Improvement of scanning speed in NSOM-based data storage device

Sung-Q Lee, Ki-Bong Song, Eun-Kyung Kim, Jun-Ho Kim, Kang-Ho Park

Proceedings Volume 5264, Optomechatronic Systems IV; (2003) https://doi.org/10.1117/12.515009
Event: Photonics Technologies for Robotics, Automation, and Manufacturing, 2003, Providence, RI, United States

Abstract

Near-field optical storage using cantilever aperture tip is a promising way for next generation optical data storage. To enhance the speed of reading and writing data, gap between tip and media should be controlled fast and precisely within near field region. In this paper, several PZT actuators are analyzed for constructing dual servo control algorithm: coarse actuators (stack PZT, bimorph PZT) for media surface inclination and fine actuator (film PZT) for media surface roughness. Dynamic analysis of stack PZT, bimorph PZT, and film PZT are performed through the frequency response. Based on the frequency response and mathematical model, fast analog controller is designed and experimented. From experimental results, analog control of film PZT is 50 times faster than conventional stage. We get the 0.1 msec over 800nm step.

Citation Download Citation

Sung-Q Lee, Ki-Bong Song, Eun-Kyung Kim, Jun-Ho Kim, and Kang-Ho Park "Improvement of scanning speed in NSOM-based data storage device", Proc. SPIE 5264, Optomechatronic Systems IV, (30 September 2003); https://doi.org/10.1117/12.515009

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