Effect of probe pulse duration in picosecond ultrasonics
Applied Physics Letters, 2022 Picosecond ultrasonics is a powerful tool for nanoscale metrology, giving access to dimensions and mechanical, thermal, and optical properties of nanomaterials.
Yuchen Liu +4 more
semanticscholar +1 more source
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
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 +6 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
Femtosecond nonlinear ultrasonics in gold probed with ultrashort surface plasmons [PDF]
, 2012 Fundamental interactions induced by lattice vibrations on ultrafast time scales become increasingly important for modern nanoscience and technology. Experimental access to the physical properties of acoustic phonons in the THz frequency range and over ...
A Devos +30 more
core +2 more sources
Time-Domain Investigations of Coherent Phonons in van der Waals Thin Films
Nanomaterials, 2020 Coherent phonons can be launched in materials upon localized pulsed optical excitation, and be subsequently followed in time-domain, with a sub-picosecond resolution, using a time-delayed pulsed probe. This technique yields characterization of mechanical,
Fabien Vialla, Natalia Del Fatti
doaj +1 more source
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
Picosecond ultrasonics for elasticity-based imaging and characterization of biological cells
Journal of Applied Physics, 2020 Characterization of the elasticity of biological cells is growing as a new way to gain insight into cell biology. Cell mechanics are related to most aspects of cellular behavior, and applications in research and medicine are broad.
F. Pérez-Cota +15 more
semanticscholar +1 more source
Picosecond ultrasonic microscopy of semiconductor nanostructures [PDF]
The Journal of the Acoustical Society of America, 2011 We describe a new picosecond ultrasonics method for the study of nanostructures. A sound pulse is generated when an ultra-short laser pulse is absorbed in a transducer structure. The sound then propagates across a thin layer of water and is reflected from the surface of the sample being examined.
Thomas J. Grimsley +4 more
openaire +1 more source
Sound velocity and absorption measurements under high pressure using picosecond ultrasonics in diamond anvil cell. Application to the stability study of AlPdMn [PDF]
, 2007 We report an innovative high pressure method combining the diamond anvil cell device with the technique of picosecond ultrasonics. Such an approach allows to accurately measure sound velocity and attenuation of solids and liquids under pressure of tens ...
B. Perrin +10 more
core +3 more sources