Brillouin scattering at high pressure: an overview

Polian, A.

doi:10.1002/jrs.1031

Cited by 55 publications

(42 citation statements)

References 59 publications

(7 reference statements)

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“…It exhibits a monotonic increase reflecting the increase in the density, because the refractive index is directly related to the density and the molecular polarizability via the LorentzLorenz equation. [26] Since the polarizability is approximately independent of pressure in many liquids, the equation of state shows pressure and temperature behaviors similar to the refractive index. [37,38] As the Fig.…”

Section: Figmentioning

confidence: 99%

“…High-pressure Brillouin spectroscopy has been a powerful tool in the investigation of equation of state and/or pressured-induced structural phase transitions of condensed matter. [20][21][22][23][24][25][26][27][28][29] In addition, the application of a laser heating technique to DAC may give us a chance of controlling both temperature and pressure of the sample. Recently, Kim et al successfully developed a high-pressure Brillouin spectrometer and applied this technique to some amorphous materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pressure Dependence of Acoustic Properties of Liquid Ethanol by using High-pressure Brillouin Spectroscopy

Ko¹,

Jeong²,

Lee³

et al. 2013

Korean Journal of Optics and Photonics

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Brillouin spectroscopy has been widely used for the investigation of acoustic properties of condensed matters in the hypersonic region. A high-pressure Brillouin spectrometer was set up by combining a diamond anvil cell and a tandem multi-pass Fabry-Perot interferometer. It was successfully applied to liquid ethanol, and the pressure dependence of the sound velocity, the refractive index and other acoustic properties were derived based on the measurements. The detailed optical setup and experimental procedure are described.

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Section: Figmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pressure Dependence of Acoustic Properties of Liquid Ethanol by using High-pressure Brillouin Spectroscopy

Ko¹,

Jeong²,

Lee³

et al. 2013

Korean Journal of Optics and Photonics

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“…The frequency of this oscillation depends on the angle between the propagation directions of the probe light and that of the coherent acoustic waves. It is precisely equal to the shift * omatsuda@eng.hokudai.ac.jp † Vitali.Goussev@univ-lemans.fr in frequency of the scattered light that would be caused by thermal phonons propagating in the same direction as the CAP and could be resolved using optical spectrometers in classic frequency-domain BS (FDBS) experiments [14][15][16][17]. That is why PAI is also often called time-domain Brillouin scattering (TDBS).…”

Section: Introductionmentioning

confidence: 99%

“…In FDBS, by varying the angle between the directions in which the probe light is incident and in which the scattered light is detected, the direction of the thermal phonons for testing can be selected [14,15,17]. Because thermal phonons are available in all directions, this approach is very flexible in providing the opportunity to significantly vary the angle between the directions of the probe light and that of the phonon wave vectors.…”

Section: Introductionmentioning

confidence: 99%

Time-domain Brillouin scattering assisted by diffraction gratings

et al. 2018

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Absorption of ultrashort laser pulses in a metallic grating deposited on a transparent sample launches coherent compression/dilatation acoustic pulses in directions of different orders of acoustic diffraction. Their propagation is detected by delayed laser pulses, which are also diffracted by the metallic grating, through the measurement of the transient intensity change of the first-order diffracted light. The obtained data contain multiple frequency components, which are interpreted by considering all possible angles for the Brillouin scattering of light achieved through multiplexing of the propagation directions of light and coherent sound by the metallic grating. The emitted acoustic field can be equivalently presented as a superposition of plane inhomogeneous acoustic waves, which constitute an acoustic diffraction grating for the probe light. Thus the obtained results can also be interpreted as a consequence of probe light diffraction by both metallic and acoustic gratings. The realized scheme of time-domain Brillouin scattering with metallic gratings operating in reflection mode provides access to wide range of acoustic frequencies from minimal to maximal possible values in a single experimental optical configuration for the directions of probe light incidence and scattered light detection. This is achieved by monitoring the backward and forward Brillouin scattering processes in parallel. Potential applications include measurements of the acoustic dispersion, simultaneous determination of sound velocity and optical refractive index, and evaluation of samples with a single direction of possible optical access.

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“…2 Despite its obvious importance, not much is known about the elasticity of silica under high pressure, since measurement of elastic constants is challenging under these conditions. 3 In particular elastic anisotropy, characterized by the difference in acoustic velocity in various directions, has not been systematically studied. On the other hand, a number of molecular dynamics and first-principles calculations have been performed on various high-pressure and/or -temperature silica phases, including coesite ͑see, for example, Refs.…”

Section: Introductionmentioning

confidence: 99%

Hydrostatic compression and high-pressure elastic constants of coesite silica

Kimizuka

Ogata

2008

Journal of Applied Physics

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Using density-functional theory, we computed all the independent elastic constants of coesite, a high-pressure polymorph of silica, as functions of pressure up to 15 GPa. The results are in good agreement with experimental measurements under ambient conditions. Also, the predicted pressure-dependent elastic properties are consistent with x-ray data in the literature concerning lattice strains at high pressures. We find that coesite, like quartz, exhibits a gradual softening of a shear modulus B 44 with increasing pressure, in contrast to the rising bulk modulus. CommentsCopyright 2008 Using density-functional theory, we computed all the independent elastic constants of coesite, a high-pressure polymorph of silica, as functions of pressure up to 15 GPa. The results are in good agreement with experimental measurements under ambient conditions. Also, the predicted pressure-dependent elastic properties are consistent with x-ray data in the literature concerning lattice strains at high pressures. We find that coesite, like quartz, exhibits a gradual softening of a shear modulus B 44 with increasing pressure, in contrast to the rising bulk modulus.

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Brillouin scattering at high pressure: an overview

Cited by 55 publications

References 59 publications

Pressure Dependence of Acoustic Properties of Liquid Ethanol by using High-pressure Brillouin Spectroscopy

Pressure Dependence of Acoustic Properties of Liquid Ethanol by using High-pressure Brillouin Spectroscopy

Time-domain Brillouin scattering assisted by diffraction gratings

Hydrostatic compression and high-pressure elastic constants of coesite silica

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