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
Changes in intra-nuclear mechanics in response to DNA damaging agents revealed by time-domain Brillouin micro-spectroscopy [PDF]
Photoacoustics, 2022 How DNA damage and repair processes affect the biomechanical properties of the nucleus interior remains unknown. Here, an opto-acoustic microscope based on time-domain Brillouin spectroscopy (TDBS) was used to investigate the induced regulation of intra ...
Liwang Liu +9 more
doaj +2 more sources
Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics [PDF]
Photoacoustics, 2023 Ultrafast pump-probe measurements are used to characterize various samples, such as biological cells, bulk, and thin-film structures. However, typical implementations of the pump-probe apparatus are either slow or complex and costly hindering wide ...
J. Pupeikis +6 more
doaj +2 more sources
ACS Nano, 2019 Although the topography of van de Waals (vdW) layers and heterostructures can be imaged by scanning probe microscopy, high-frequency interface elastic properties are more difficult to assess. These can influence the stability, reliability and performance
Elton L Savi +2 more
exaly +2 more sources
A scanning acoustic microscope based on picosecond ultrasonics. [PDF]
Ultrasonics, 2015 We report on the development of a new type of scanning acoustic microscope. We use a femtosecond light pulse to generate a short sound pulse, and then focus this sound onto the sample by means of a specially designed and microfabricated acoustic lens of radius a few microns. The sound travels to the sample through a thin layer of water.
S. Che, P. Guduru, A. Nurmikko, H. Maris
semanticscholar +3 more sources
New Journal of Physics, 2017 We quantitatively study interfacial adhesion in a two-layer membrane system consisting of Al and Si with femtosecond time-resolved laser spectroscopy. High-frequency acoustic pulses in the sub-THz regime are utilized to characterize the membrane system ...
Martin Grossmann +7 more
doaj +2 more sources
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 +14 more
doaj +2 more sources
Subsurface Imaging of Grain Microstructure Using Picosecond Ultrasonics [PDF]
Acta Materialia, 2016 We report on imaging subsurface grain microstructure using picosecond ultrasonics. This approach relies on elastic anisotropy of crystalline materials where ultrasonic velocity depends on propagation direction relative to the crystal axes. Picosecond duration ultrasonic pulses are generated and detected using ultrashort light pulses.
M. Khafizov +8 more
semanticscholar +4 more sources