Results 1 to 10 of about 745 (158)

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, W. Hu, B. Willenberg, M. Mehendale, G.A. Antonelli, C.R. Phillips, U. Keller   +6 more
doaj   +5 more sources

Principles and advances in ultrafast photoacoustics; applications to imaging cell mechanics and to probing cell nanostructure [PDF]

Photoacoustics, 2023
In this article we first present the foundations of ultrafast photoacoustics, a technique where the acoustic wavelength in play can be considerably shorter than the optical wavelength.
Bertrand Audoin
doaj   +4 more sources

Special issue introduction: Ultrafast photoacoustics [PDF]

Photoacoustics
Vitalyi E. Gusev, Bertrand Audoin, Oliver B. Wright   +2 more
doaj   +4 more sources

Ultrafast nano generation of acoustic waves in water via a single carbon nanotube [PDF]

Photoacoustics, 2022
Generation of ultra high frequency acoustic waves in water is key to nano resolution sensing, acoustic imaging and theranostics. In this context water immersed carbon nanotubes (CNTs) may act as an ideal optoacoustic source, due to their nanometric ...
Michele Diego, Marco Gandolfi, Alessandro Casto, Francesco Maria Bellussi, Fabien Vialla, Aurélien Crut, Stefano Roddaro, Matteo Fasano, Fabrice Vallée, Natalia Del Fatti, Paolo Maioli, Francesco Banfi   +11 more
doaj   +5 more sources

Towards shaping picosecond strain pulses via magnetostrictive transducers [PDF]

Photoacoustics, 2023
Using time-resolved x-ray diffraction, we demonstrate the manipulation of the picosecond strain response of a metallic heterostructure consisting of a dysprosium (Dy) transducer and a niobium (Nb) detection layer by an external magnetic field. We utilize
Maximilian Mattern, Jan-Etienne Pudell, Karine Dumesnil, Alexander von Reppert, Matias Bargheer   +4 more
doaj   +2 more sources

Understanding photoacoustic signal formation in the presence of transparent thin films [PDF]

Photoacoustics
Strain-induced variation of the refractive index is the main mechanism of strain detection in photoacoustic experiments. However, weak strain-optic coupling in many materials limits the application of photoacoustics as an imaging tool.
Maksym Illienko, Matthias C. Velsink, Stefan Witte   +2 more
doaj   +2 more sources

Extreme ultraviolet transient gratings: A tool for nanoscale photoacoustics. [PDF]

Photoacoustics, 2023
Collective lattice dynamics determine essential aspects of condensed matter, such as elastic and thermal prop-erties. These exhibit strong dependence on the length-scale, reflecting the marked wavevector dependence of lattice excitations.
Foglia L, Mincigrucci R, Maznev AA, Baldi G, Capotondi F, Caporaletti F, Comin R, De Angelis D, Duncan RA, Fainozzi D, Kurdi G, Li J, Martinelli A, Masciovecchio C, Monaco G, Milloch A, Nelson KA, Occhialini CA, Pancaldi M, Pedersoli E, Pelli-Cresi JS, Simoncig A, Travasso F, Wehinger B, Zanatta M, Bencivenga F.   +25 more
europepmc   +3 more sources

Surface-plasmon-enhanced strain-wave-induced optical diffraction changes from a segmented grating

Photoacoustics, 2023
We report on surface-plasmon-polariton-enhanced (SPP-enhanced), strain-wave-induced reflection and diffraction changes on a Au-covered, segmented grating.
Thomas J. van den Hooven, Paul C.M. Planken   +1 more
doaj   +1 more source

Concepts and use cases for picosecond ultrasonics with x-rays

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   +1 more source

Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfaces

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, Théo Thréard, David H. Hurley, Samuel Raetz   +3 more
doaj   +1 more source