Maximizing Infrared Extinction Coefficients for Metal Discs, Rods, and Spheres

Abstract

Infrared spectral extinction coefficients, extinction cross sections per volume of material, are computed for metal disks, rods, and spheres as a function of dimensions, conductivity, and wavelength. Computations for rods use a combination of infinite cylinder and Rayleigh finite and perfectly conducting prolate spheroid scattering theories. Disk computations use a combination of diffraction, thin film optics, Rayleigh finite, and perfectly conducting oblate spheroid scattering theories. Sphere computations use a combination of Geometric Optics, Anomalous Diffraction, and Rayleigh scattering theories. Complex conductivities are predicted as a function of wavelength using the Drude model along with thin wire and thin film models for boundary limited electron mean free path. Spectral extinction coefficients are maximized using surface plots to identify optimal ranges for particle dimensions and conductivities at a particular wavelength.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2002
Accession Number
ADA400404

Entities

People

  • Janon Embury

Organizations

  • Edgewood Chemical Biological Center

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Sensors

DTIC Thesaurus Topics

  • Boundaries
  • Computational Science
  • Diffraction
  • Electromagnetic Scattering
  • Films
  • Intermediate Frequencies
  • Materials
  • Mean Free Path
  • Optical Properties
  • Optics
  • Particles
  • Radiation
  • Refractive Index
  • Scattering
  • Thick Films
  • Thin Films
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Image Processing and Computer Vision.

Technology Areas

  • Microelectronics