Results 131 to 140 of about 79,181 (180)
Some of the next articles are maybe not open access.
Stimulated Brillouin Scattering
Applied Optics, 1969Stimulated Brillotuin scattering, the efficient scattering of light from parametrically amplified therma acoustic waves, has found many valuable uses since its initial observation and identification. Among these uses are included the measurement of hypersonic velocities and absorption in the gigaherz frequency range, laser frequency shifting, laser Q ...
openaire +2 more sources
Resonant Brillouin scattering in ZnSe
Physical Review B, 1977Resonant Brillouin scattering in ZnTe has been investigated at room temperature by using injected acoustic domains.
Sadao Adachi, Chihiro Hamaguchi
openaire +1 more source
Multikilohertz stimulated Brillouin scattering
Optics Letters, 1994We report, for the first time to our knowledge, multikilohertz stimulated-Brillouin-scattering phase conjugation of copper-vapor laser radiation. The small wavelength shift associated with the Stokes radiation is shown to permit double-pass aberration correction of the copper-vapor laser, avoiding the postlasing absorption.
M A, O'Key, M R, Osborne
openaire +2 more sources
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
openaire +1 more source
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
openaire +1 more source
Brillouin scattering in semiconductors
1975Brillouin scattering is known to be a valuable probe of acoustic phonons in gases, liquids and solids. The effects peculiar to Brillouin scattering in semiconductors will be the subject of this chapter. The velocity of sound is determined directly from the Brillouin shift; so, generally, elastic constants and velocity anisotropy, relaxation processes ...
openaire +1 more source
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
openaire +1 more source
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.
openaire +1 more source
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.
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source