INFRARED SPECTRA OF SMALL IONIC CRYSTALS,

Abstract

The long wavelength part of the dispersion curves for a thin disc-shaped, rocksalt type crystal is calculated by means of an approximate model. It is found that for wavelengths of the same order as, or smaller than, the thickness of the crystal significant shifts in the frequencies of the optical branches occur. Absorption frequencies and oscillator strengths are calculated as a function of the thickness of the specimen and of the angle of incidence of the infrared radiation. It is found that such a crystal absorbs also at frequencies other than the usual transverse optical frequency. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1965
Accession Number
AD0802714

Entities

People

  • Raphael Ruppin
  • Robert Englman

Organizations

  • Israel Atomic Energy Commission

Tags

DTIC Thesaurus Topics

  • Angle Of Incidence
  • Crystals
  • Electromagnetic Radiation
  • Electromagnetic Spectra
  • Frequency
  • Infrared Radiation
  • Infrared Spectra
  • Ionic Crystals
  • Long Wavelengths
  • Radiation
  • Spectra
  • Thickness

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Structural Dynamics.