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Stability Enhancement of Super-RENS High Temperature Readout Signal

Jooho Kim, Jaecheol Bae, Inoh Hwang, Chongsam Chung, Insik Park, Takayuki Shima, Takashi Nakano, and Junji Tominaga

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Abstract

We report the readout stability improvement results of super-resolution near field structure (Super-RENS) write-once read-many (WORM) disk at a blue laser optical system. (Laser wavelength 405nm, numerical aperture 0.85) By using diffusion barrier structure (GeSbTe sandwiched by GeN) and high transition temperature recording material (BaTiO3), material diffusion of phase change layer and recording mark degradation were greatly improved during high power (Pr=2.0mW) readout process up to 1X105 times.

© 2007 Optical Society of America

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