Model for Brillouin Scattering in Amorphous Solids | Zendy

Martin A. J. | Zendy; Brenig W. | Zendy

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Model for Brillouin Scattering in Amorphous Solids

Author(s) -

Martin A. J.,

Brenig W.

Publication year - 1974

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220640120

Subject(s) - brillouin scattering , brillouin zone , scattering , phonon , amorphous solid , intensity (physics) , optics , condensed matter physics , physics , light scattering , range (aeronautics) , phonon scattering , materials science , computational physics , plane (geometry) , chemistry , mathematics , geometry , crystallography , laser , composite material

An elastic continuum model is presented for Brillouin scattering by an amorphous solid. The assumption that light scatters on distorted plane wave acoustic phonons leads to the prediction that the scattered intensity plotted as a function of the frequency transfer Ω o consists of the usual Brillouin peaks plus a background which, a t room temperature, goes like Ω o ; for small Ω o , but rises less steeply for larger Ω o , and may even bend over within the range of the validity of the model, depending on the correlation lengths for spatial fluctuations due to disorder and on the speeds of sound. For the case of a‐Si, additional results are obtained with the help of existing experimental measurements.

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