The faint lines, called brillouin peaks, are caused by light being inelastically scattered by
acoustic phonons
in the glass.
Phonon scattering.
In particular, the technique is suited to measurement of
surface phonons
and vibrational modes of adsorbates.
Conventional systems rely on measuring raman scattering by
optical phonons.
Phonon dispersion
curves are represented only by acoustic branches.
Alternatives are included above - j.r. ) the only stop in this organ not enclosed is the
diapason phonon
on the great organ.
Phonon density
of states onto given sets of atoms.
Phonon mode
band has been observed to differ in strength on various ybco samples.
Phonon frequency
can be tuned by changing the frequency of one of the lasers.
Phonon dispersion curves
are represented only by acoustic branches.
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