Revealing sub-μm and μm-scale textures in H2O ice at megabar pressures by time-domain Brillouin scattering

Nikitin, S. M.; Chigarev, Nikolay; Tournat, Vincent; Bulou, A.; Gasteau, Damien; Castagnède, Bernard; Zerr, Andreas; Gusev, Vitalyi

doi:10.1038/srep09352

Cited by 33 publications

(59 citation statements)

References 72 publications

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“…TDBS assisted by diffraction gratings could be also advantageous in several applications with limited optical access to the samples [12,40,47]. It could provide the opportunity to monitor multiple BS processes/frequencies even with incident and the detected/scattered light propagating collinearly (for example, in the case of the probe light incident normally on the grating and the detection of either reflected or transmitted light in the directions also normal to the grating surfaces).…”

Section: Discussionmentioning

confidence: 99%

“…Picosecond acoustic interferometry (PAI) is a powerful opto-acousto-optic technique for nondestructive and noncontact testing of transparent materials at the nanoscale [1][2][3][4][5][6][7][8][9][10][11][12][13]. First, using an ultrashort pump laser pulse, a propagating picosecond coherent acoustic pulse (CAP) is launched into the material.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Time-domain Brillouin scattering assisted by diffraction gratings

et al. 2018

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“…In this situation, well suited for the investigation of mechanical properties of ultrathin solid or liquid samples, the occurrence of time-domain Brillouin scattering (TDBS) phenomena in transparent materials has been used to investigate viscoelastic properties of matter at ultrasound GHz to THz frequencies [6]. Recently, several examples have shown that TDBS is sensitive to diverse phenomena, including spatial mechanical, optical or acousto-optical inhomogeneities [7][8][9][10][11][12][13], non-linear acoustic waves or weak shock waves [14,15], and even GHz transverse acoustic phonons in viscoelastic liquids [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Time-domain Brillouin scattering for the determination of laser-induced temperature gradients in liquids

Chaban

Shin

Klieber

et al. 2017

Review of Scientific Instruments

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We present an optical technique based on ultrafast photoacoustics to precisely determine the local temperature distribution profile in liquid samples in contact with a laser heated optical transducer. This ultrafast pump-probe experiment uses time-domain Brillouin scattering (TDBS) to locally determine the light scattering frequency shift. As the temperature influences the Brillouin scattering frequency, the TDBS signal probes the local laser-induced temperature distribution in the liquid. We demonstrate the relevance and the sensitivity of this technique for the measurement of the absolute laser-induced temperature gradient of a glass forming liquid prototype, glycerol, at different laser pump powers -i.e. different steady state background temperatures. Complementarily, our experiments illustrate how this TDBS technique can be applied to measure thermal diffusion in complex multilayer systems in contact to a surrounding liquid.

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“…Perfect reflection of the acoustic pulses from the mechanically free or rigid surfaces is accompanied, in general, only by an abrupt phase shift of the sinusoid [4][5][6]. The time at which the acoustic pulse arrives at the interface can be identified through the observation of the phase and/or amplitude changes of the initial sinusoid and/or through the appearance of an additional sinusoidal contribution to the transient reflectivity at a different Brillouin frequency [7][8][9][10][11][12][13][14][15]. The PAI is useful for the acoustic pulse time-of-flight measurements [9,14] and is commonly applied to derive velocities of the acoustic waves and thicknesses of thin films.…”

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confidence: 99%

In situimaging of the dynamics of photo-induced structural phase transition at high pressures by picosecond acoustic interferometry

et al. 2017

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Picosecond acoustic interferometry is used to monitor in time the motion of the phase transition boundary between two water ice phases, VII and VI, coexisting at a pressure of 2.15 GPa when compressed in a diamond anvil cell at room temperature. By analyzing the time-domain Brillouin scattering signals accumulated for a single incidence direction of probe laser pulses, it is possible to access ratios of sound velocity values and of the refractive indices of the involved phases, and to distinguish between the structural phase transition and a recrystallization process. Two-dimensional spatial imaging of the phase transition dynamics indicates that it is initiated by the pump and probe laser pulses, preferentially at the diamond/ice interface. This method should find applications in three-dimensional monitoring with nanometer spatial resolution of the temporal dynamics of low-contrast material inhomogeneities caused by phase transitions or chemical reactions in optically transparent media.

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Revealing sub-μm and μm-scale textures in H2O ice at megabar pressures by time-domain Brillouin scattering

Cited by 33 publications

References 72 publications

Time-domain Brillouin scattering assisted by diffraction gratings

Time-domain Brillouin scattering assisted by diffraction gratings

Time-domain Brillouin scattering for the determination of laser-induced temperature gradients in liquids

In situimaging of the dynamics of photo-induced structural phase transition at high pressures by picosecond acoustic interferometry

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