ETD Collection

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Author: search.filters.author.Pang, WenjunSubject: search.filters.subject.Brillouin scattering.

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    Measurement of elastic properties of hard films using Brillouin scattering
    (1997) Pang, Wenjun
    Brillouin scattering of light is used to study the various surface acoustic modes that are predicted theoretically to be supported by TiN thin films on high speed steel (HSS). Information is thereby obtained on the elastic properties and adhesion of the films, which range in thickness from 20nm to 4180nm. A Green's function method, invoking the surface ripple mechanism for the inelastic scattering of light, is used to calculate the Brillouin spectrum for scattering from the surface acoustic excitations. For the TiN/HSS combination, guided modes take the form of true SAW, highly damped p- SAW, "pre-Rayleigh" and "quasi-Rayleigh" and its higher order modes as the film thickness increases. (Abbreviation abstract)