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A boundary integral equation method in short-wavelength-to-period diffraction on multilayer 1D gratings and rough mirrors

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1 Author(s)
Goray, Leonid I. ; St. Petersburg Phys. & Technol., Russian Acad. of Sci., St. Petersburg, Russia

Diffraction problems by 1D multilayer structures having arbitrary border profiles including edges are considered at smallest wavelength-to-period ratios. The integral equation theory is so flexible that one can point out a few areas of its modifiability. In this work special attention is paid to physical models and low-level details, as well as to the generalization of the power balance criterion for the case of absorbing gratings. In the case of shallow gratings and mirrors, introducing speed-up terms produces an adverse numerical effect because of the ensuing uncontrolled growth of coefficients in analytically improved asymptotic estimations.

Published in:

Days on Diffraction, 2008. DD '08. Proceedings of the International Conference

Date of Conference:

3-6 June 2008