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<p>Dear colleagues,</p>
<p>It is my pleasure to invite you to Seminar of Institute of
Physics of Charles University, entitled:</p>
<b>Characterization of advanced materials by laser-ultrasonic
methods</b><br>
<p>Speaker: <a moz-do-not-send="true"
href="https://www.it.cas.cz/psedlak/">Ing. Petr Sedlák, Ph.D.</a>
<br>
<br>
Time: Tuesday 23.11.2021 from 14:00<br>
<br>
Place: Seminar room of Institute of Physics F285 (atelier) ,
second floor, Ke Karlovu 5, Prague</p>
<p><i>Abstract:</i><i><br>
</i></p>
Laser-ultrasonic (LU) techniques have been widely utilized in the
past decades to characterize mechanical properties of materials due
to their indisputable advantages such as their contactless nature or
investigation of dynamic response in a broadband frequency range
(from kHz up to GHz). They are based on generation and detection of
ultrasonic waves by lasers providing thus mainly information of
elasticity of materials, its anisotropy or frequency dependence.<br>
<br>
In this talk, recent applications of LU methods for mechanical
properties characterization of functional and more complex materials
will be presented focusing mainly to resonant ultrasound
spectroscopy (detection of free sample vibrations), transient
grating spectroscopy (transient diffraction grating generating
surface acoustic waves), Brillouin spectroscopy (inelastic
scattering of light on acoustic phonons) and picosecond ultrasound
(pump-probe technique with ultrashort light pulses). <br>
<p>With my best regards</p>
Jaroslav Hamrle
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Mgr. Jaroslav Hamrle, Ph.D.
Institute of Physics, room F232
Faculty of Mathematics and Physics
Charles University
Ke Karlovu 5
121 16 Prague
Czech Republic
tel: +420-95155 1340
email: <a class="moz-txt-link-abbreviated" href="mailto:hamrle@karlov.mff.cuni.cz">hamrle@karlov.mff.cuni.cz</a>
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