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Observation of anomalous acoustic phonon dispersion in by broadband stimulated Brillouin scattering
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10.1063/1.3593488
/content/aip/journal/apl/98/21/10.1063/1.3593488
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/21/10.1063/1.3593488
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) 2D contour plot of the oscillatory component of the in an STO sample as a function of probe delay and probe wavelength. The (black) continuous thin lines were obtained by fitting the experimental positions of the interference maxima with Eq. (1) in the text, using the known dispersion relationship and . Inset: scheme of stimulated BS (for the meaning of symbols see the text). (b),(c) Thin lines (red and blue): cuts of the 2D map showing at selected probe wavelengths. Thick (gray) lines: corresponding fits with undamped sine waves.

Image of FIG. 2.
FIG. 2.

(a) 2D Fourier transform of the map shown in Fig. 1(a); (b) oscillation frequency of the measured signal (black solid line) compared with the calculated one assuming a constant sound speed (red dashed line); (c) retrieved sound speed as a function of phonon wave vector (the gray error bar indicates the estimated measurement precision, as described in the text).

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/content/aip/journal/apl/98/21/10.1063/1.3593488
2011-05-25
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scattering
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/21/10.1063/1.3593488
10.1063/1.3593488
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