Evaluation of Optical and Acoustical Properties of Ba1−xSrxTiO3 Thin Film Material Library via Conjugation of Picosecond Laser Ultrasonics with X-ray Diffraction, Energy Dispersive Spectroscopy, Electron Probe Micro Analysis, Scanning Electron and Atomic Force Microscopies [PDF]
Nanomaterials, 2021 Wide-range continuous spatial variation of the film composition in lateral compositionally graded epitaxial films requires the development of high throughput measurement techniques for their local and non-destructive characterization with the highest ...
Sathyan Sandeep +7 more
doaj +7 more sources
Concepts and use cases for picosecond ultrasonics with x-rays [PDF]
Photoacoustics, 2023 This review discusses picosecond ultrasonics experiments using ultrashort hard x-ray probe pulses to extract the transient strain response of laser-excited nanoscopic structures from Bragg-peak shifts.
Maximilian Mattern +5 more
doaj +2 more sources
Sound velocity mapping from GHz Brillouin oscillations in transparent materials by optical incidence from the side of the sample [PDF]
Photoacoustics, 2023 Time-domain Brillouin scattering (TDBS) is an all-optical experimental technique for investigating transparent materials based on laser picosecond ultrasonics. Its application ranges from imaging thin-films, polycrystalline materials and biological cells
Motonobu Tomoda +4 more
doaj +2 more sources
Non-contact and label-free biomechanical imaging: Stimulated Brillouin microscopy and beyond [PDF]
Frontiers in Physics, 2023 Brillouin microscopy based on spontaneous Brillouin scattering has emerged as a unique elastography technique because of its merit of non-contact, label-free, and high-resolution mechanical imaging of biological cell and tissue.
Chenjun Shi, Hongyuan Zhang, Jitao Zhang
doaj +2 more sources
Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfaces [PDF]
Photoacoustics, 2023 A theory has been developed to interpret time-domain Brillouin scattering (TDBS) experiments involving coherent acoustic pulse (CAP) and light pulse beams propagating at an angle to each other.
Vitalyi E. Gusev +3 more
doaj +2 more sources
Refraction, beam splitting and dispersion of GHz surface acoustic waves by a phononic crystal [PDF]
Photoacoustics, 2023 We exploit a time-resolved ultrafast optical technique to study the propagation of point-excited surface acoustic waves on a microscopic two-dimensional phononic crystal in the form of a square lattice of holes in a silicon substrate.
Osamu Matsuda +5 more
doaj +2 more sources
Time-domain Brillouin scattering for evaluation of materials interface inclination: Application to photoacoustic imaging of crystal destruction upon non-hydrostatic compression [PDF]
Photoacoustics, 2023 Time-domain Brillouin scattering (TDBS) is a developing technique for imaging/evaluation of materials, currently used in material science and biology. Three-dimensional imaging and characterization of polycrystalline materials has been recently reported,
Sathyan Sandeep +8 more
doaj +2 more sources
Optoacoustic lenses for lateral sub-optical resolution elasticity imaging [PDF]
PhotoacousticsIn this paper, we demonstrate for the first time the focusing of gigahertz coherent phonon pulses propagating in water using picosecond ultrasonics and Brillouin light scattering. We achieve this by using planar Fresnel zone plate and concave lenses with
Mengting Yao +5 more
doaj +2 more sources
Looking Inside Micro- and Nano-Mechanical Pillar Resonators: A Picosecond Ultrasonics Approach
Proceedings, 2020 Pillar-shaped Gallium arsenide (GaAs) micromechanical resonators are fabricated, and the feasibility to measure the inside of the pillars in the axial direction with laser-induced GHz ultrasound based on picosecond ultrasonics is tested.
Paul Stritt +5 more
doaj +1 more source
Revealing sub-{\mu}m inhomogeneities and {\mu}m-scale texture in H2O ice at Megabar pressures via sound velocity measurements by time-domain Brillouin scattering [PDF]
, 2014 Time-domain Brillouin scattering technique, also known as picosecond ultrasonic interferometry, which provides opportunity to monitor propagation of nanometers to sub-micrometers length coherent acoustic pulses in the samples of sub-micrometers to tens ...
Bulou, Alain +7 more
core +6 more sources