Experimental observation of anharmonic effects in coherent phonon dynamics in diamond

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10386495" target="_blank" >RIV/00216208:11320/18:10386495 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.diamond.2018.10.018" target="_blank" >https://doi.org/10.1016/j.diamond.2018.10.018</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.diamond.2018.10.018" target="_blank" >10.1016/j.diamond.2018.10.018</a>

Result language
angličtina
Original language name
Experimental observation of anharmonic effects in coherent phonon dynamics in diamond
Original language description
We present a study of coherent optical phonon dynamics in monocrystalline and polycrystalline diamond using transient transmission spectroscopy with few-cycle laser pulses. Besides the oscillations at the fundamental phonon frequency of 40 THz we observe a signal at second harmonic frequency and four weak frequency sidebands (25.0 THz, 32.5 THz, 47.5 THz and 55.0 THz). Potential origin of these sidebands is discussed along with the dependence of the observed signal on experimental conditions (pump power, sample thickness, etc.). Phonon dephasing time in polycrystalline diamond T-2,T-poly = 6.0 +/- 0.4(ps) is found to be shorter than in monocrystalline diamond T-2,T-mono = 7.0 +/- 0.4ps.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
<a href="/en/project/GJ18-10486Y" target="_blank" >GJ18-10486Y: Ultrafast processes in solids controlled by few-cycle laser pulses</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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