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  • 1
    Electronic Resource
    Electronic Resource
    Far infrared study of optical phonons in K1−xRbxI mixed crystals (1986)
    Springer
    International journal of infrared and millimeter waves 7 (1986), S. 1805-1811 
    Details
    ISSN: 1572-9559
    Keywords: DFTS ; mixed alkalai halide ; zone-center optical phonons ; far infrared
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The farinfrared properties of mixed alkalai halide crystals, K1−xRbxI, x=0.25 and 0.50, have been studied at room temperature. Dispersive Fourier transform spectroscopy (DFTS) has been used to obtain the complex dielectric function of these samples. Infrared-active phonon modes are observed at frequencies close to those of KI and RbI. This two-mode behavior is in agreement with theoretical predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01010078
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  • 2
    Electronic Resource
    Electronic Resource
    A critical point analysis of two phonon structure in the far infrared dielectric response of GaAs (1984)
    Springer
    International journal of infrared and millimeter waves 5 (1984), S. 1009-1016 
    Details
    ISSN: 1572-9559
    Keywords: far infrared ; dielectric function ; anharmonic damping function ; critical-point
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The technique of asymmetric Fourier transform spectroscopy has been used to determine the complex relative permittivities of undoped GaAs at frequencies near the transverse optic mode. It is demonstrated that the anharmonic damping function calculated from these results is sensitive to two phonon processes excited by the anharmonic decay of the q≃O transverse optic phonon. Critical-point phonon frequencies are assigned from the structure revealed in damping function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01009589
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