Brillouin Interferometry

Brillouin spectroscopy is a technique that allows us to measure acoustic sound velocity in small transparent samples up to very high pressures in a diamond-anvil cell. This technique exploits Brillouin scattering, inelastic scattering by collective thermal motions in condensed materials.

Bildergalerie Brillouin-Interferometer

 

Our Brillouin spectroscopy system at GFZ Potsdam is designed to host large experimental setups (you can see the very large Eulerian cradle with a diamond-anvil cell).

 

Pressure dependence of K_S

Pressure dependence of K_S (bulk modulus) and G (shear modulus) of fayalite [Fe₂SiO₄] measured by Brillouin scattering up to 12 GPa and compared with San Carlos olivine [(Mg_0.9Fe_0.1)SiO₄] (fayalite data from Speziale et al., JGR, 109, B12202, 2004).


Contact person: Dr. Sergio Speziale