Results 1 to 10 of about 1,507 (165)

Evaluation of Optical and Acoustical Properties of Ba_1−xSr_xTiO₃ 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, Samuel Raetz, Jerome Wolfman, Beatrice Negulescu, Guozhen Liu, Jean-Louis Longuet, Théo Thréard, Vitalyi E. Gusev   +7 more
doaj   +8 more sources

Picosecond ultrasonics with miniaturized semiconductor lasers [PDF]

Ultrasonics, 2020
There is a great desire to extend ultrasonic techniques to the imaging and characterization of nanoobjects. This can be achieved by picosecond ultrasonics, where by using ultrafast lasers it is possible to generate and detect acoustic waves with frequencies up to terahertz and wavelengths down to nanometers.
Marc Sorel, Alexey Scherbakov, Martin Kamp   +2 more
exaly   +10 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, Alexander von Reppert, Steffen Peer Zeuschner, Marc Herzog, Jan-Etienne Pudell, Matias Bargheer   +5 more
doaj   +4 more sources

Fundamentals of picosecond laser ultrasonics [PDF]

Ultrasonics, 2015
The aim of this article is to provide an introduction to picosecond laser ultrasonics, a means by which gigahertz-terahertz ultrasonic waves can be generated and detected by ultrashort light pulses. This method can be used to characterize materials with nanometer spatial resolution.
Osamu Matsuda, Maria Cristina Larciprete, Roberto Li Voti   +2 more
exaly   +5 more sources

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

Ultrasonics, 2016
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 ...
Maju Kuriakose, Samuel Raetz, Nikolay Chigarev   +2 more
exaly   +7 more sources

Evaluation of the Structural Phase Transition in Multiferroic (Bi_1−x Pr_x)(Fe_0.95 Mn_0.05)O₃ Thin Films by A Multi-Technique Approach Including Picosecond Laser Ultrasonics [PDF]

Applied Sciences, 2019
Picosecond laser ultrasonics is an experimental technique for the generation and detection of ultrashort acoustic pulses using ultrafast lasers. In transparent media, it is often referred to as time-domain Brillouin scattering (TDBS).
Samuel Raetz, Alexey Lomonosov, Sergey Avanesyan, Nikolay Chigarev, Elton de Lima Savi, Alain Bulou, Nicolas Delorme, Zheng Wen, Qiao Jin, Maju Kuriakose, Anthony Rousseau, Gwenaëlle Vaudel, Pascal Ruello, Di Wu, Vitalyi Gusev   +14 more
doaj   +4 more sources

A different way of performing picosecond ultrasonic measurements in thin transparent films based on laser-wavelength effects [PDF]

Applied Physics Letters, 2005
We present a way of using picosecond ultrasonics to simultaneously get the thickness and elastic properties of thin dielectric layers. This is based on the use of a blue probe which is shown to improve the detection of acousto-optic oscillations in the dielectric from which the sound velocity can be measured from the refractive index.
Arnaud Devos
exaly   +4 more sources

Picosecond ultrasonics with a free-running dual-comb laser

Optics Express, 2021
We present a free-running 80-MHz dual-comb polarization-multiplexed solid-state laser which delivers 1.8 W of average power with 110-fs pulse duration per comb. With a high-sensitivity pump-probe setup, we apply this free-running dual-comb laser to picosecond ultrasonic measurements.
Justinas Pupeikis, Benjamin Willenberg, Francois Bruno, Mike Hettich, Alexander Nussbaum-Lapping, Matthias Golling, Carolin P. Bauer, Sandro L. Camenzind, Abdelmjid Benayad, Patrice Camy, Bertrand Audoin, Christopher R. Phillips, Ursula Keller   +12 more
  +9 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, Akira Toda, Osamu Matsuda, Vitalyi E. Gusev, Oliver B. Wright   +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