Near-Field Phase-Change Optical Recording of 1.36 Numerical Aperture
- 1 February 2000
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 39 (2S)
- https://doi.org/10.1143/jjap.39.962
Abstract
A bit density of 125 nm was demonstrated through near-field phase-change (PC) optical recording at the wavelength of 657 nm by using a supersphere solid immersion lens (SIL). The lens unit consists of a standard objective and a φ2.5 mm SIL. Since this lens size still prevents the unit from being mounted on an air-bearing slider, we developed a one-axis positioning actuator and an active capacitance servo for precise gap control to thoroughly investigate near-field recording. An electrode was fabricated on the bottom of the SIL, and a capacitor was formed facing a disk material. This setup realized a stable air gap below 50 nm, and a new method of simulating modulation transfer function (MTF) optimized the PC disk structure at this gap height. Obtained jitter of 8.8% and a clear eye-pattern prove that our system successfully attained the designed numerical-aperture (NA) of 1.36.Keywords
This publication has 20 references indexed in Scilit:
- A Simulation of Magneto-Optical Signals in Near-Field RecordingJapanese Journal of Applied Physics, 1999
- Increasing throughput of a near-field optical fiber probe over 1000 times by the use of a triple-tapered structureApplied Physics Letters, 1998
- InGaN/GaN/AlGaN-based laser diodes with modulation-doped strained-layer superlattices grown on an epitaxially laterally overgrown GaN substrateApplied Physics Letters, 1998
- Formulation and comparison of two recursive matrix algorithms for modeling layered diffraction gratingsJournal of the Optical Society of America A, 1996
- Near-field optical data storageApplied Physics Letters, 1996
- Theory of high-NA imaging in homogeneous thin filmsJournal of the Optical Society of America A, 1996
- Near-field optical data storage using a solid immersion lensApplied Physics Letters, 1994
- High-numerical-aperture lens system for optical storageOptics Letters, 1993
- Near-field magneto-optics and high density data storageApplied Physics Letters, 1992
- Analysis of multilayer thin-film structures containing magneto-optic and anisotropic media at oblique incidence using 2×2 matricesJournal of Applied Physics, 1990