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On a Fast Integral Equation Method for Diffraction Gratings
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作者 a.rathsfeld G.Schmidt B.H.Kleemann 《Communications in Computational Physics》 SCIE 2006年第6期984-1009,共26页
The integral equation method for the simulation of the diffraction by optical gratings is an efficient numerical tool if profile gratings determined by simple crosssection curves are considered.This method in its rece... The integral equation method for the simulation of the diffraction by optical gratings is an efficient numerical tool if profile gratings determined by simple crosssection curves are considered.This method in its recent version is capable to tackle profile curves with corners,gratings with thin coated layers,and diffraction scenarios with unfavorably large ratio period over wavelength.We discuss special implementational issues including the efficient evaluation of the quasi-periodic Green kernels,the quadrature algorithm,and the iterative solution of the arising systems of linear equations.Finally,as an example we present the simulation of echelle gratings which demonstrates the efficency of our approach. 展开更多
关键词 Diffraction gratings integral equation method PRECONDITIONING
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