Surface brillouin scattering in opaque thin films

Lamb waves in unsupported thin films: A Brillouin-scattering study.

Using Brillouin scattering we have succeeded in observing the normal modes of vibration of unsupported films in a region where the dispersion relationship is quadratic. Extremely low-lying excitations were observed in thin films with thicknesses as small as 200 A. Contrary to what has been found in work on supported films, we are able to extract information on a number of the elastic moduli bec...

Mechanical properties of low- and high-k dielectric thin films: A surface Brillouin light scattering study

Elastic Characterization of Transparent and Opaque Films, Multilayers and Acoustic Resonators by Surface Brillouin Scattering: A Review

There is currently a renewed interest in the development of experimental methods to achieve the elastic characterization of thin films, multilayers and acoustic resonators operating in the GHz range of frequencies. The potentialities of surface Brillouin light scattering (surf-BLS) for this aim are reviewed in this paper, addressing the various situations that may occur for the different types ...

Brillouin Scattering of Cluster-assembled Carbon Films

The low frequency vibrational spectrum of cluster beam deposited carbon films was studied by Brillouin light scattering. In thin films the values of both bulk modulus and shear modulus has been estimated from the shifts of surface phonon peaks. The values found indicate a mainly sp’ coordinated random network with low density. In thick films a bulk longitudinal phonon peak was detected in a spe...

A scattering model for surface-textured thin films

We present a mathematical model that relates the surface morphology of randomly surface-textured thin films with the intensity distribution of scattered light. The model is based on the first order Born approximation see e.g., M. Born and E. Wolf, Principles of Optics, 7th ed. Cambridge University Press, Cambridge, England, 1999 and on Fraunhofer scattering. Scattering data of four transparent ...