Summary

URSI Commission B 2013 International Symposium on Electromagnetic Theory EMTS 2013

2013

Session Number:23PM1P

Session:

Number:23PM1P-18

Formulation of Electromagnetic Scattering from Surface-Relief Grating with Period Modulation

Koki Watanabe,  

pp.546-549

Publication Date:2013/5/20

Online ISSN:2188-5079

DOI:10.34385/proc.30.23PM1P-18

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Summary:
This paper considers the electromagnetic scattering problem of surface-relief grating with period modulation, and presents a formulation based on the coordinate transformation method (C-method). The C-method is originally developed to analyze the plane-wave scattering from perfectly periodic structures, and uses the pseudo-periodic property of the fields. Since the structure under consideration is not perfectly periodic, the fields are not pseudo-periodic and the C-method cannot be directly applied. This paper introduces the pseudo-periodic Fourier transform to convert the fields in imperfectly periodic structures to pseudo-periodic ones, and the C-method becomes then applicable.