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Optical Engineering

Numerical modeling of diffractive devices using the finite element method
Author(s): Bernd Lichtenberg; Neal C. Gallagher
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Paper Abstract

The finite element method (FEM) is introduced to numerically model near-field diffraction devices using Maxwell's equations. This method is commonly used in the antenna and microwave communities to analyze scattering and waveguiding problems, but is not yet popular in the optics community. Its advantages are the rigorous modeling using Maxwell's equations, the ease of implementation, the sparsity of the resulting system matrix, and the possibility to include complex material structures. The FEM can be used for perlormance evaluation of given devices and as a helpful tool in the design process for new devices. The FEM is reviewed, its numerical implementation is discussed, and some example structures are considered.

Paper Details

Date Published: 1 November 1994
PDF: 9 pages
Opt. Eng. 33(11) doi: 10.1117/12.179876
Published in: Optical Engineering Volume 33, Issue 11
Show Author Affiliations
Bernd Lichtenberg, Purdue Univ. (United States)
Neal C. Gallagher, Purdue Univ. (United States)


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