Comment on the Scattering-Matrix Method for Determining Defect Modes
نویسنده
چکیده
A formulation of the scattering-matrix method for calculating localized modes at any type of planar defect has been given by Achar and Barsch' and applied to the problem of determining the surface modes of a semi-infinite NaCl crystal. Here we will consider only the application of this formulation when the defect is a surface. Similar criticisms hold for other types of defects. Achar and Barsch assume that the disylacements associated with a surface mode have the form
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