Speaker
Jakub Kušnír
(Institute of Thermomechanics of the Czech Academy of Sciences)
Description
The influence of spot size on the quality of the time- and frequency-domain results of transient grating spectroscopy (TGS) was investigated. The experiment was performed on a single-crystalline sample of Ni with a highly symmetrical cut (110). Sharpening of the frequency peaks of the SAW was observed for larger spot sizes. However, the best obtainable sharpness of the frequency peaks strongly depends on the crystallographic direction of the propagating SAW. Ultra-transient effects observable in UTGS measurements depended strongly on the power density of the pump laser.
Authors
Jakub Kušnír
(Institute of Thermomechanics of the Czech Academy of Sciences)
Zbyněk Makovský
(Grammar school Pardubice Dašická 1083)
Tomáš Grabec
(Institute of Thermomechanics of the Czech Academy of Sciences)
David Mareš
(Institute of Thermomechanics of the Czech Academy of Sciences)
Kristýna Repček
(Institute of Thermomechanics of the Czech Academy of Sciences)
Pavla Stoklasová
(Institute of Thermomechanics of the Czech Academy of Sciences)
Petr Sedlák
(Institute of Thermomechanics of the Czech Academy of Sciences)
Hanuš Seiner
(Institute of Thermomechanics of the Czech Academy of Sciences)