Modal analysis of lamellar gratings using the moment method with subsectional basis and adaptive spatial resolution.
We formulate the problem of diffraction by a one-dimensional lamellar grating as an eigenvalue problem in which adaptive spatial resolution is introduced thanks to a new coordinate system that takes into account the permittivity profile function. We use the moment method with triangle functions as expansion functions and pulses as test functions. Our method is successfully compared with the Fourier modal method and the frequency domain finite difference method.
Granet
Gérard
G
Clermont Uniniversités, Université Blaise Pascal, Lasmea BP 10448, F-63000 Clermont-Ferrand, France. granet@univ-bpclermont.fr
Andriamanampisoa
Lala Bakonirina
LB
Raniriharinosy
Karyl
K
Armeanu
Ana Maria
AM
Edee
Kofi
K