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
Apparent attenuation by opto-acoustic defocus in phonon microscopy
Photoacoustics, 2020 Understanding the mechanical properties of biological cells is a challenging problem for the life sciences partly because there are limited methods for mapping elasticity with high resolution.
Fernando Pérez-Cota +5 more
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
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 Brillouin scattering assisted by diffraction gratings [PDF]
, 2017 Absorption of ultrashort laser pulses in a metallic grating deposited on a transparent sample launches coherent compression/dilatation acoustic pulses in directions of different orders of acoustic diffraction. Their propagation is detected by the delayed
Chaban, Ievgeniia +4 more
core +3 more sources
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 +6 more sources
High-Acoustic-Impedance Tantalum Oxide Layers for Insulating Acoustic Reflectors [PDF]
, 2012 This work describes the assessment of the acoustic properties of sputtered tantalum oxide films intended for use as high-impedance films of acoustic reflectors for solidly mounted resonators operating in the gigahertz frequency range.
Capilla Osorio, José +5 more
core +2 more sources
Optimization of a perfect absorber multilayer structure by genetic algorithms [PDF]
, 2018 Background: An increasing interest has been recently grown in the development of nearly perfect absorber materials for solar energy collectors and more in general for all the thermophotovoltaic applications.
Li Voti, Roberto
core +1 more source