cw stimulated Brillouin gain spectroscopy of liquids

Ratanaphruks, K.; Grubbs, W. Tandy; MacPhail, Richard A.

doi:10.1016/0009-2614(91)80231-l

Cited by 21 publications

(14 citation statements)

References 25 publications

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“…In addition, the peak develops a noticeable asymmetry as the temperature decreases, with the intensity skewed toward higher pump frequencies and away from the center of the spectrum. To characterize the Brillouin gain line shapes, we used nonlinear least squares to fit a function of the form (11) to the experimental spectra in the region of the gain peak. A typical example of the quality of the fits is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…(1), (4), and (8a)-(8c) with the empirical line shape function in Eq. (11) leads to the following expression for A:…”

Section: Resultsmentioning

confidence: 99%

“…In an extension of the stimulated Brillouin gain spectroscopy experiments of Jacobsen and Shen 6 and of She and co-workers,7-9 we have recently used narrow linewidth continuous-wave lasers to measure the stimulated Brillouin gain spectrum of liquid carbon disulfide at room temperature with very high resolution, and we have examined the scattering angle dependence of the spectrum as well. 11 ,12 There has also been considerable recent interest in stimulated Brillouin scattering in carbon disulfide as it relates to four-wave phase conjugation. 28 -34 Finally, various frequency-and time-domain four-wave mixing techniques have been used to study the depolarized stimulated scattering spectrum of carbon disulfide, with the focus being on ultrafast dynamics associated with inertial and collision-induced behavior.…”

Section: Introductionmentioning

confidence: 99%

“…The average values The experimental Brillouin gain spectrum at 161.9 K (trace a), the least squares fit of the function in Eq (11). to the experimental spectrum (trace b), and the residuals from the fit, expanded by a factor of 2 (trace c).…”

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confidence: 99%

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Rotational–translational coupling and asymmetric line shapes in the high resolution stimulated Brillouin gain spectra of liquid carbon disulfide

Grubbs

MacPhail

1992

The Journal of Chemical Physics

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High resolution stimulated Brillouin gain spectrometer Rev. Sci. Instrum. 65, 34 (1994); 10.1063/1.1144743Highresolution stimulated Brillouin gain spectroscopy of liquid carbon disulfide: Dependence of the linewidths and peak gain on scattering angle Theory of depolarized Rayleigh-Brillouin spectra and rotation-translation coupling in molecular liquids and solidsWe have measured high resolution stimulated Brillouin gain spectra of liquid carbon disulfide at a number of temperatures between 158 and 301 K. As the temperature decreases the shape of the Brillouin peak becomes increasingly asymmetric, with the intensity skewed away from the center of the spectrum. We show that this unusual asymmetry results from the coupling between rotational and translational motions. Rotational-translational coupling is well known to give rise to line shape distortions in the depolarized light scattering spectra of nonspherical molecules (e.g., the "Rytov dip"), but the observation of line shape distortions (the asymmetry) in the polarized Brillouin lines has not been noted before. In the latter case, the asymmetry in the Brillouin peak can be traced to a cross correlation between the collective molecular orientation variable and the number density fluctuation and can be viewed as an acoustically induced birefringence. A calculation using the theory of rotational-translational coupling and experimental values for the relevant parameters reproduces quantitatively the observed asymmetry in the Brillouin lines over the entire temperature range. 8906

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Section: Resultsmentioning

confidence: 99%

“…(1), (4), and (8a)-(8c) with the empirical line shape function in Eq. (11) leads to the following expression for A:…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Rotational–translational coupling and asymmetric line shapes in the high resolution stimulated Brillouin gain spectra of liquid carbon disulfide

Grubbs

MacPhail

1992

The Journal of Chemical Physics

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“…4 shows observed Rayleigh wing spectra in isotropic phase of nematic liquid crystal 4'-n-Pentyl-4-cyanobiphenyl (5CB). The spectral shape is dispersion-type Lorentzian spectrum, as is expected from the fluctuation-dissipation theorem [3]. Fig.…”

Section: Rayleigh Wing Spectroscopy In Liquid Crystal 5cbmentioning

confidence: 91%

Correlated-fields high-resolution spectroscopy

Ohno

Ishii

Sonehara

et al. 2004

Journal of Luminescence

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Stimulated Brillouin Gain Spectroscopy of Superfluid Helium-4

2021

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We report Stimulated Brillouin gain spectra of bulk superfluid helium-4. Stimulated Brillouin gain spectroscopy is a powerful optical method to probe the acoustic properties of liquid helium in a narrow spatio-temporal domain with moderate optical power and fast acquisition rates. We determine the velocity of first sound of superfluid helium-4 from the Stimulated Brillouin gain spectra between 0.90 K and 2.17 K and compare it to well known available data, which validate our experimental method.

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cw stimulated Brillouin gain spectroscopy of liquids

Cited by 21 publications

References 25 publications

Rotational–translational coupling and asymmetric line shapes in the high resolution stimulated Brillouin gain spectra of liquid carbon disulfide

Rotational–translational coupling and asymmetric line shapes in the high resolution stimulated Brillouin gain spectra of liquid carbon disulfide

Correlated-fields high-resolution spectroscopy

Stimulated Brillouin Gain Spectroscopy of Superfluid Helium-4

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