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
Application of transient femtosecond polarimetry / ellipsometry technique in picosecond laser ultrasonics [PDF]
Journal of Physics: Conference Series, 2007 The method of time-resolved polarimetry has been employed to monitor picosecond acoustic pulses. The technique is able to resolve longitudinal and shear echoes separated by less than 10ps. A proper choice of the incident polarization state gives the opportunity to tune the sensitivity to a particular acoustic mode.
D Mounier +7 more
openaire +3 more sources
High-laser-wavelength sensitivity of the picosecond ultrasonic response in transparent thin films [PDF]
Physical Review B, 2006 We explore from both the theoretical and experimental points of view the influence of the laser wavelength on the strain pulses detected in thin transparent layers using the picosecond ultrasonic technique. From a theoretical analysis of the displacement detection involved in such experiments, we predict amplitude and sign changes in the detected ...
Devos, Arnaud +3 more
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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
Observation of Zone-Folded Acoustic Phonons in Terahertz Quantum Cascade Lasers using Picosecond Ultrasonics [PDF]
, 2010 8 pages, 5 ...
Bruchhausen, A +7 more
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Picosecond laser ultrasonic measurements of interlayer elastic properties of 2H-MoSe2 and 2H-WSe2
Materials Today Chemistry, 2020 Abstract We have used the ultrafast pump-probe technique known as picosecond ultrasonics to generate and detect coherent acoustic phonon pulses with frequencies reaching 40 GHz in exfoliated crystals of MoSe2 and WSe2 on Si and sapphire substrates.
E. Thompson +7 more
openaire +3 more sources
UltrasonicsThe effective detection and imaging of near-surface micro defects has been the key problem in the ultrasonic inspection field for a long time. Laser ultrasound has high resolution and sensitivity which is the effective technology to detect micro defects. In this paper, the time and frequency domain characteristics of the picosecond laser ultrasound and
Kangwen, Huang +6 more
+5 more sources
Picosecond ultrasonics for the modulation and nanoscopy of semiconductor lasers
, 2017 Thomas Czerniuk
openaire +3 more sources