A Simulation of Magneto-Optical Signals in Near-Field Recording
- 1 December 1999
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 38 (12R) , 6743-6749
- https://doi.org/10.1143/jjap.38.6743
Abstract
The diffraction from two-dimensional magneto-optical marks has been calculated using the plane wave expansion method and the Fourier modal method. The modulation transfer function (MTF) in near field magneto-optical recording has been simulated for the first time on the basis of the strict vector diffraction theory. The simulated result proved that the magneto-optical signal is reduced by only 3 dB at a spatial frequency of NA/λ, for an air gap of 50 nm between a solid immersion lens with an effective numerical aperture (NA) of 1.5 and a magneto-optical disk surface.Keywords
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