Diffraction of a Parallel- and Perpendicular-Polarized Wave from an Echelette Grating*

Abstract
The boundary-value problem of diffraction of a parallel- or perpendicular-polarized wave from an echelette grating is numerically solved. Parallel and perpendicular Wood’s anomalies are investigated. A very strong anomaly for negative incident angle into a back-scattering order is found.

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