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The High Frequency Tail of the Lattice Absorption Spectra of Simple Crystals

  • A. J. Barker
  • G. R. Wilkinson
  • N. E. Massa
  • S. S. Mitra
Part of the Optical Physics and Engineering book series (OPEG)

Abstract

The absorption coefficient in the pretransparent regime (10.0>α>0.1 cm 1) has been measured for several alkali halides as functions of temperature extending up to their melting points. The frequency dependence of the absorption coefficient is calculated by means of a breathing shell model using multiphonon density of states. The temperature dependence of the absorption coefficient is explained in terms of a temperature dependent effective phonon frequency.

Keywords

Infrared Absorption Phonon Frequency Alkali Halide Phonon Density Transparent Regime 
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Copyright information

© Plenum Press, New York 1975

Authors and Affiliations

  • A. J. Barker
    • 1
  • G. R. Wilkinson
    • 1
  • N. E. Massa
    • 2
  • S. S. Mitra
    • 2
  1. 1.Department of Physics, King’s CollegeUniversity of LondonLondonUK
  2. 2.Department of Electrical EngineeringUniversity of Rhode IslandKingstonUSA

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