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Instrument Characteristics

Brillouin Spectroscopy

Ar+ laser equipped with an intra-cavity etalon operating at 488.0 or 514.5 nm.
Triple-pass Fabry-Perot interferometer.
Appropriate optical components electronics for signal processing.
Accuspec-CANBERRA acquisition board for data collecting.
Home made optical furnace capable to reach temperatures up to 1100 K.

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Brillouin Spectroscopy

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Brillouin spectroscopy is a laser light scattering applicable to the low-frequency, low-wavenumber region of the spectrum. It analyzes light scattered by travelling acoustic waves in the medium. From the shift of the Brillouin peaks one can determine the speed of sound and from the Brillouin width the sound attenuation coefficient. Brillouin spectra are frequently measured as a function of temperature; the continuous decrease in the speed of sound the onset of a maximum in the sound attenuation coefficient mark the presence of a relaxation process.

 

Services Sample properties
  • Mechanical properties
  • Optical properties
  • Magnetic properties
  • Viscoelastic/thermodynamic properties of amorphous materials
  • Characteristic relaxation times related to the structural relaxation of the material Structural and dynamical properties of materials
Any transparent or semitransparent material such as liquids, glasses and films.

 

 

 

Application Form

Contact Person
S. N. Yannopoulos

 

 
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