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- W2089016994 abstract "When the boundary element method is applied to an electromagnetic scattering problem in an open region, an infinite integral must be carried out if the scatterer has an infinite extent. If the incident wave is a beam wave, it exists in a narrow region centered around the illuminated region. However, although the surface current excited by this incident field decays quickly in the case of E-wave incidence since the position is separated from the illuminated region, it is distributed in a broad range in the H-wave incidence. In this paper, a method for evaluating such an integral over a broad region is applied to the problem of scattering by arbitrarily shaped pits and bosses. It is demonstrated that an analysis for the H-wave incidence can be done with the same accuracy for the E-wave. In conventional analysis methods, substantial numerical errors are unavoidable for the H-wave case. In addition, an analysis is carried out for the output signal characteristics for the hypothetical signal detection system of an optical disk. A detailed study is carried out as to how the sum and difference signal output by rectangular trapezoidal and V-shaped pits and bosses depend on the shape and dimensions of the pit and boss or the off-axis shift (tracking misalignment) of the incident beam and the shift of the focus." @default.
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- W2089016994 date "1989-01-01" @default.
- W2089016994 modified "2023-09-23" @default.
- W2089016994 title "Analysis of the light—beam scattering and the sum and differential signal output by arbitrarily shaped pits and bosses" @default.
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- W2089016994 doi "https://doi.org/10.1002/ecjb.4420720505" @default.
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