Picosecond laser ultrasonics for imaging of transparent polycrystalline materials compressed to megabar pressures

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

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)

Abstract

Picosecond laser ultrasonics is an all-optical experimental technique based on ultrafast high repetition rate lasers applied for the generation and detection of nanometric in length coherent acoustic pulses. In optically transparent materials these pulses can be detected not only on their arrival at the sample surfaces but also all along their propagation path inside the sample providing opportunity for imaging of the sample material spatial inhomogeneities traversed by the acoustic pulse. Application of this imaging technique to polycrystalline elastically anisotropic transparent materials subject to high pressures in a diamond anvil cell reveals their significant texturing/structuring at the spatial scales exceeding dimensions of the individual crystallites.

Original languageEnglish
Pages (from-to)259-267
Number of pages9
JournalUltrasonics
Volume69
DOIs
Publication statusPublished - 1 Jul 2016
Externally publishedYes

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Keywords

  • 3D imaging
  • High pressures
  • Laser ultrasonics
  • Picosecond ultrasonic interferometry
  • Time-domain Brillouin scattering

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