Accession Number : ADA318756
Title : A Real-Space, Modal-Expansion Method with the R-Matrix Propagator To Calculate Grating Diffraction.
Descriptive Note : Interim rept. Oct 95-Sep 96,
Corporate Author : NAVAL AIR WARFARE CENTER WEAPONS DIV CHINA LAKE CA
Personal Author(s) : Elson, J. M. ; Tran, P.
PDF Url : ADA318756
Report Date : SEP 1996
Pagination or Media Count : 21
Abstract : Recently the R-matrix propagation algorithm has been used in conjunction with a k-space modal-expansion to calculate diffraction from gratings. The R-matrix eliminates numerical instability associated with deep gratings. We introduce here a real-space version of the modal-expansion method. A detailed numerical study of the convergence versus number of diffracted orders is given. For wavelength lambda, we consider sinusoidal gratings having height h = 1.7-lambda and 17-lambda where both have period d = l.7-lambda. We consider absorbing metallic and nonabsorbing dielectric gratings. Results are compared with those of other authors and with our previous results.
Descriptors : *GRATINGS(SPECTRA), *DIFFRACTION, MATRICES(MATHEMATICS), NUMERICAL ANALYSIS, CONVERGENCE.
Subject Categories : Optics
Distribution Statement : APPROVED FOR PUBLIC RELEASE