Rigorous model of the scattering of a focused spot by a grating and its application in optical recording

J.M. Brok, H.P. Urbach

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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.
    Original languageEnglish
    Pages (from-to)256-272
    JournalJournal of the Optical Society of America A, Optics, Image Science and Vision
    Volume20
    Issue number2
    DOIs
    Publication statusPublished - 2003

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