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Integral equation computation of bump grating efficiencies in TE polarization

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Abstract

A method is described for computing the electromagnetic field that is diffracted by a grating in TE polarization. It uses a Green function that takes into account the air-substrate interface, and it is based on the solution of a two-dimensional integral equation. It is shown that this particular Green’s function reduces the integration domain to a bump emerging from the substrate and reduces dramatically the computation requirements for large-period gratings. Numerical examples are given.

© 1993 Optical Society of America

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