The finite-element method is applied to model phase-change recording in a grooved recording stack. A rigorous model for the scattering of a three-dimensional focused spot by a one-dimensional periodic grating is used to determine the absorbed light in a three-dimensional region inside the phase-change layer. The optical model is combined with a three-dimensional thermal model to compute the temperature distribution. Land and groove recording and polarization dependence are studied, and the model is applied to the Blu-ray Disc.
© 2005 Optical Society of America
(050.1950) Diffraction and gratings : Diffraction gratings
(210.0210) Optical data storage : Optical data storage
(210.4590) Optical data storage : Optical disks
(210.4770) Optical data storage : Optical recording
J. H. Brusche, A. Segal, and H. P. Urbach, "Finite-element model for phase-change recording," J. Opt. Soc. Am. A 22, 773-786 (2005)