A Real-Space, Modal-Expansion Method with the R-Matrix Propagator To Calculate Grating Diffraction.

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.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1996
Accession Number
ADA318756

Entities

People

  • J. M. Elson
  • Peter Tran

Organizations

  • Naval Air Warfare Center Weapons Division

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Aerial Warfare
  • Agreements
  • Algorithms
  • Angle Of Incidence
  • Band Structures
  • Boundaries
  • Classification
  • Convergence
  • Dielectrics
  • Differential Equations
  • Diffraction
  • Electric Fields
  • Equations
  • Instability
  • Magnetic Fields
  • Materials
  • Photonic Crystals

Fields of Study

  • Physics

Readers

  • Analytical Mechanics
  • Calculus or Mathematical Analysis
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering

Technology Areas

  • Space