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Brillouin scattering in liquids
Proceedings of the IEEE, 1965The development of monochromatic, intense, and highly directional laser light sources has made it possible to measure accurately the velocity, the frequency, and the lifetimes of thermally excited hypersonic sound waves. The technique employed is to study the spectrum of the light scattered from the thermally generated sound waves in the medium.
G. Benedek, T. Greytak
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1996
Abstract Brillouin scattering is the inelastic interaction of light with acoustic phonons which results in a shift in the frequency of scattered radiation. This effect is similar to Raman scattering, but information is obtained abont acoustic branches of the phonon spectrum.
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Abstract Brillouin scattering is the inelastic interaction of light with acoustic phonons which results in a shift in the frequency of scattered radiation. This effect is similar to Raman scattering, but information is obtained abont acoustic branches of the phonon spectrum.
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Brillouin scattering in Hg2Cl2
Solid State Communications, 1977Abstract Hg2Cl2 undergoes a second order phase transition around 185 K. All the elastic constants have been measured above (tetragonal phase) and below (orthorhombic phase) the transition point. The results support the hypothesis that the transition is induced by the condensation of a transversal acoustical mode at an X point of the first Brillouin ...
Cao Xuan An, G. Hauret, J.P. Chapelle
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Journal of the Physical Society of Japan, 1975
The elastic constants of GaSe have been determined by studying Brillouin scattering for various crystal orientations. Depending on the orientation, the spectra exhibit one or two components, which are assigned to specific modes of vibration. From the observed Brillouin frequency shifts, the elastic constants of GaSe are evaluated with a least-square ...
Minoru Tanaka +2 more
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The elastic constants of GaSe have been determined by studying Brillouin scattering for various crystal orientations. Depending on the orientation, the spectra exhibit one or two components, which are assigned to specific modes of vibration. From the observed Brillouin frequency shifts, the elastic constants of GaSe are evaluated with a least-square ...
Minoru Tanaka +2 more
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Brillouin scattering in RbNbWO6
Journal of Applied Physics, 2003Micro-Brillouin scattering measurements of RbNbWO6, a defect pyrochlore, that exhibits superionic conductivity and ferroelectric properties, have been performed in the 213–573 K temperature range. In this work the presence of quasielastic scattering (central peak) has been documented.
Mirosław Ma̧czka +4 more
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Brillouin scattering in oligobutene
The Journal of Chemical Physics, 1982Ultrasonic and hypersonic relaxation data are reported for a polymeric liquid oligobutene at frequencies between 51 kHz and 8 GHz in the temperature range from -60 to 100 °C. It is found that the superposition principle holds up to 0.76 GHz for shear data, while for the bulk process spectral narrowing takes place around 3 GHz.
Ryusuke Kono +2 more
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Brillouin Scattering Spectrometry
1979Light is scattered from homogeneous materials due to microscopic local variations in the dielectric constant, and hence index of refraction within the bulk of the material. If these variations are the result of time dependent fluctuations, the scattering will generally be inelastic due to energy transfer between the incident photons and the medium ...
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Neutron News, 1990
Abstract For several years, an international group of scientists has been developing instrumentation and gathering experience regarding neutron Brillouin scattering. The requirements are neutrons of relatively high energy, small scattering angles, and high resolution in order to obtain data at small momentum transfer and high energy transfer.
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Abstract For several years, an international group of scientists has been developing instrumentation and gathering experience regarding neutron Brillouin scattering. The requirements are neutrons of relatively high energy, small scattering angles, and high resolution in order to obtain data at small momentum transfer and high energy transfer.
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1981
During the past 20 years, since the invention of the laser, light scattering has become an increasingly powerful means of measuring the spectra of systems in thermal equilibrium. Sergio Porto played a leading role in the development of techniques to take maximum advantage of the properties of laser light in its application to light scattering, and he ...
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During the past 20 years, since the invention of the laser, light scattering has become an increasingly powerful means of measuring the spectra of systems in thermal equilibrium. Sergio Porto played a leading role in the development of techniques to take maximum advantage of the properties of laser light in its application to light scattering, and he ...
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Advances in Brillouin–Mandelstam light-scattering spectroscopy
Nature Photonics, 2021F. Kargar, A. Balandin
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