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
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 +3 more
openaire +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 +7 more sources
Picosecond ultrasonic measurements using an optical cavity [PDF]
Journal of Applied Physics, 2009 A detailed analysis of the use of an optical cavity to enhance picosecond ultrasonic signals is presented. The optical cavity is formed between a distributed Bragg reflector and the metal thin film samples to be studied. Experimental results for Al and Cu films show enhancement of acoustic signals by up to two orders of magnitude and are in good ...
Li, Yanqiu +3 more
openaire +2 more sources
Generation and coherent control of terahertz acoustic phonons in superlattices of perovskite oxides
New Journal of Physics, 2021 We utilized transmission-type pump–probe technique to investigate coherent acoustic phonons in the superlattices of perovskite oxides such as SrIrO _3 /SrTiO _3 and SrRuO _3 /SrTiO _3 . Because the films in the superlattices are of high-quality and their
Chi-Yuan Yang +3 more
doaj +1 more source
Sub-Terahertz Monochromatic Transduction with Semiconductor Acoustic Nanodevices [PDF]
, 2008 We demonstrate semiconductor superlattices or nanocavities as narrow band acoustic transducers in the sub-terahertz range. Using picosecond ultrasonics experiments in the transmission geometry with pump and probe incident on opposite sides of the thick ...
A. Fainstein +10 more
core +3 more sources
Surface Acoustic Waves in Thin Films Nanometrology [PDF]
, 2015 Thin films nanometrology is an emerging field in nanoscience as the synthesis, processing and applications of nanostructured thin films require an in-depth knowledge of their elastic constants. The elastic energy of a surface acoustic wave propagating in
BETTUCCI, Andrea
core +1 more source
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 +3 more
openaire +2 more sources