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• W1980944880 abstract "A plane wave incident obliquely onto the open end of a wide parallel-plane waveguide generates an interior field that resembles a geometric optical sheet beam whose initially well-defined shape gets diffused after undergoing multiple reflection. This behavior can be confirmed, but not physically well explained, from numerical results obtained by summing over the aperture-excited guided modes. A phenomenologically incisive representation is obtained by subjecting the guided mode sum to partial Poisson summation that yields an exact hybrid field comprising the multiple reflected geometric optical beam, some multiple reflected edge-diffracted rays, some guided modes, plus remainder terms. Asymptotic approximations reduce these exact forms to the wave constituents of the nonuniform and, when required, uniformized geometrical theory of diffraction. Numerical results presented for various parameter regimes delineate the ranges of applicability of the asymptotic forms and also the relative importance of the individual wave contributions. In the parameter range where geometrical features of the field can still be resolved, the hybrid form is not only physically appealing but also numerically more efficient than alternatives involving only rays or only modes." @default.
• W1980944880 created "2016-06-24" @default.
• W1980944880 creator A5005193873 @default.
• W1980944880 creator A5068421889 @default.
• W1980944880 date "1987-07-01" @default.
• W1980944880 modified "2023-10-02" @default.
• W1980944880 title "Rays, modes and beams for plane wave coupling into a wide open-ended parallel-plane waveguide" @default.
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• W1980944880 doi "https://doi.org/10.1016/0165-2125(87)90003-5" @default.
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