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
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.