FDTD Readout Analysis of a Near-Field Patterned Media Magnetooptical Recording System

Using a combination of diffraction analysis and the three-dimensional finite-difference time-domain technique, the readout behavior of a near-field magnetooptical-patterned media-based storage system incorporating a blue laser and a solid immersion lens is analyzed. It is demonstrated that the phase...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2006-10, Vol.42 (10), p.2471-2473
Main Authors: Manfredonia, M.M., Nutter, P.W.
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Diffraction
Exact sciences and technology
Finite difference method
Finite difference methods
Finite difference time domain method
finite-difference time-domain analysis
Islands
Lasers
Lenses
Magnetic analysis
Magnetic materials
Magnetism
Magnetization
Magnetooptic recording
Materials science
Mathematical analysis
Optical films
Other topics in materials science
Pattern analysis
Physics
Recording
Solid lasers
Time domain analysis
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Description
Summary:Using a combination of diffraction analysis and the three-dimensional finite-difference time-domain technique, the readout behavior of a near-field magnetooptical-patterned media-based storage system incorporating a blue laser and a solid immersion lens is analyzed. It is demonstrated that the phase response of the islands themselves plays a more dominant role than the magnetization in the system readout behavior. Additionally, it is shown that, despite this characteristic, the recovery of a suitable readout signal is still possible at an island size and separation close to the system's optical limit, and also that the appearance of the readout signal is highly dependent upon the island height
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2006.878638