Rigorous model of the scattering of a focused spot by a grating and its application in optical recording |
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Authors: | Brok J M Urbach H P |
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Affiliation: | Philips Research Laboratory, Professor Holstlaan 4, 5656 AA Eindhoven, The Netherlands. |
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Abstract: | We describe a rigorous model for the scattering of a three-dimensional focused spot by a one-dimensional periodic grating. The incident field is decomposed into a sum of quasi-periodic fields, and the scattering of each of these is computed inside one unit cell of the grating. The model is applied to the simulation of the readout of a DVD disk. The polarization dependence of the reflected near and far fields is studied, and, for a TM-polarized incident spot, plasmons are observed in the reflected far-field intensity. |
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