FEM and Its Generalization for the Diffraction by Polygonal Profile Gratings

Abstract

For the numerical computation of efficiencies for optical gratings, there exists a huge variety of algorithms. Dealing with a boundary value problem for an elliptic partial differential equation, the application of finite element methods (FEM) is natural too. However, the oscillatory nature of the electromagnetic fields requires some modifications. The resulting FEM program can be used as a part of an algorithm to design optimal gratings.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2002
Accession Number
ADP013900

Entities

People

  • A. Rathsfeld
  • Gudrun Schmidt
  • J. Elschner

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computations
  • Differential Equations
  • Diffraction
  • Electromagnetism
  • Electronic Mail
  • Equations
  • Frequency
  • Integral Equations
  • Magnetic Fields
  • Materials
  • Partial Differential Equations
  • Phase Shift
  • Plane Waves
  • Polarization
  • Refractive Index
  • Technical Information Centers
  • Variational Equations

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Optical Physics and Photonics.