Experimental Studies of Multiphonon IR Absorption

  • Dieter W. Pohl
Part of the Optical Physics and Engineering book series (OPEG)


The temperature dependence of multiphonon absorption in NaF was measured and analyzed in terms of phonon occupation numbers. This procedure allows to decompose the exponential reststrahl absorption wing into N-phonon spectra (N = 2 ... 5) with considerable structure. The latter coincides with phonon combinations with particularly large densities of states. Comparison with data on KBr, NaCl, and LiF demonstrates the influence of zero point motion on the magnitude of multiphonon absorption.


Oscillator Strength Momentum Conservation Combinational Mode Nominal Transmission Phonon Occupation Number 
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Copyright information

© Plenum Press, New York 1975

Authors and Affiliations

  • Dieter W. Pohl
    • 1
  1. 1.IBM Zurich Research LaboratoryRüschlikonSwitzerland

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