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

Sergey M. Nikitin, Nikolay Chigarev, Vincent Tournat, Alain Bulou, Damien Gasteau, Bernard Castagnede, Andreas Zerr*, Vitalyi E. Gusev

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)
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Abstract

The time-domain Brillouin scattering technique, also known as picosecond ultrasonic interferometry, allows monitoring of the propagation of coherent acoustic pulses, having lengths ranging from nanometres to fractions of a micrometre, in samples with dimension of less than a micrometre to tens of micrometres. In this study, we applied this technique to depth-profiling of a polycrystalline aggregate of ice compressed in a diamond anvil cell to megabar pressures. The method allowed examination of the characteristic dimensions of ice texturing in the direction normal to the diamond anvil surfaces with sub-micrometre spatial resolution via time-resolved measurements of the propagation velocity of the acoustic pulses travelling in the compressed sample. The achieved imaging of ice in depth and in one of the lateral directions indicates the feasibility of three-dimensional imaging and quantitative characterisation of the acoustical, optical and acousto-optical properties of transparent polycrystalline aggregates in a diamond anvil cell with tens of nanometres in-depth resolution and a lateral spatial resolution controlled by pump laser pulses focusing, which could approach hundreds of nanometres.

Original languageEnglish
Article number9352
JournalScientific reports
Volume5
DOIs
Publication statusPublished - 23 Mar 2015
Externally publishedYes

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    Nikitin, S. M., Chigarev, N., Tournat, V., Bulou, A., Gasteau, D., Castagnede, B., ... Gusev, V. E. (2015). Revealing sub-μm and μm-scale textures in H2O ice at megabar pressures by time-domain Brillouin scattering. Scientific reports, 5, [9352]. https://doi.org/10.1038/srep09352