Abstract

Super-resolution readout properties of super-resolution near-field structure disc have greatly improved with a platinum-oxide layer. The carrier to noise ratio of 200-nm mark trains reached 46.1 dB, and 42.3 dB was obtained even at 150-nm mark trains by use of DVD-based red laser system. Moreover, recorded pattern which consists of various mark lengths including 110-nm mark trains were digitally reproduced through a modified signal process circuit. These excellent properties are attributed to high thermal stability of platinum-oxide layer that results in rigid bubble p it formation and fine platinum particle precipitation in the pit upon recording operation.

© 2003 Optical Society of America