Real-Time Detection of Coherent Vibrational Dynamics in TiN Films
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00377172" target="_blank" >RIV/68407700:21340/24:00377172 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1002/adom.202401390" target="_blank" >https://doi.org/10.1002/adom.202401390</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/adom.202401390" target="_blank" >10.1002/adom.202401390</a>
Alternative languages
Result language
angličtina
Original language name
Real-Time Detection of Coherent Vibrational Dynamics in TiN Films
Original language description
Titanium nitride (TiN) has recently gained considerable interest because of its remarkable plasmonic properties and for its strong electron–phonon (e–ph) coupling, leading to extremely fast (<100 fs) electron-lattice cooling. Here, the generation of coherent phonons in TiN films is reported, along with their real-time detection by means of broadband transient reflection spectroscopy with sub-15-fs temporal resolution. The measurements show damped oscillations, superimposed to excited state electronic decay. A coherent vibrational mode is revealed, with ~10 THz frequency ascribed to defect-activated normal modes, consistent with spontaneous Raman scattering data, and a dephasing time of ~250 fs. Two π-phase flips are also observed located at photon energies corresponding to interband optical transitions (at 3.2 and 2.5 eV), ascribed to selective coupling of the vibrational mode to these transitions; the energy modulation induced by the vibrational coherence is evaluated. It is shown that the displacive excitation of coherent phonons model describes the coherent response in terms of temporal behavior and of spectral amplitude profile. Overall, a comprehensive and detailed analysis of coherent phonons in TiN films, so far undected, is provided and relevant information on TiN photo-physical properties, potentially useful for its applications, is given.
Czech name
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Czech description
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Classification
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
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advanced Optical Materials
ISSN
2195-1071
e-ISSN
2195-1071
Volume of the periodical
12
Issue of the periodical within the volume
30
Country of publishing house
DE - GERMANY
Number of pages
10
Pages from-to
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UT code for WoS article
001322517500001
EID of the result in the Scopus database
2-s2.0-85204028112