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Bit-by-Bit Detection on Super-Resolution Near-Field Structure Disk with Platinum Oxide Layer

2003; Institute of Physics; Volume: 42; Issue: Part 2, No. 6A Linguagem: Inglês

10.1143/jjap.42.l589

1347-4065

Hiroshi Fuji, Takashi Kikukawa, Junji Tominaga,

Semiconductor Quantum Structures and Devices

Bit-by-bit detection at a recording density of 0.11 µm pits is achieved on a super-resolution near-field structure (super-RENS) disk with a platinum oxide layer. Pits and spaces are arranged as a recording pattern for pit position recording. The pattern is recorded on the disk with using a 635-nm-wavelength laser and an objective lens with a 0.6 numerical aperture. After recording using laser pulses with pre- and post-heating, the pattern is correctly reproduced despite a size that is smaller than the resolution limit. Furthermore, the readout durability is more improved than that of the previous silver oxide disk. The pattern is clearly digitized by a read channel circuit for bit-by-bit detection.