Resolving transient temperature and density during ultrafast laser ablation of aluminum
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F23%3A43970866" target="_blank" >RIV/49777513:23640/23:43970866 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1007/s00339-023-06922-5" target="_blank" >https://doi.org/10.1007/s00339-023-06922-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00339-023-06922-5" target="_blank" >10.1007/s00339-023-06922-5</a>
Alternative languages
Result language
angličtina
Original language name
Resolving transient temperature and density during ultrafast laser ablation of aluminum
Original language description
To understand the dynamics of ultrashort-pulse laser ablation, the interpretation of ultrafast time-resolved optical experiments is of utmost importance. To this end, spatiotemporally resolved pump-probe ellipsometry may be utilized to examine the transiently changing dielectric function of a material, particularly when compared to two-temperature model simulations. In this work, we introduce a consistent description of electronic transport as well dielectric function for bulk aluminum, which enables unambiguous quantitative predictions of transient temperature and density variations close to the surface after laser excitation. Potential contributions of these temperature and density fluctuations to the proposed optical model are investigated. We infer that after the thermal equilibrium of electrons and lattice within a few picoseconds, the real part of the dielectric function mostly follows a density decrease, accompanied by an early mechanical motion due to stress confinement. In contrast, the imaginary part is susceptible to a complicated interaction between time-varying collision frequency, plasma frequency, and a density dependency of the interband transitions. The models proposed in this study permit an outstanding quantitative prediction of the ultrashort-pulse laser ablation’s final state and transient observables. Consequently, it is anticipated that in the future, these models will provide a quantitative understanding of the dynamics and behavior of laser ablation.
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
<a href="/en/project/EH22_008%2F0004634" target="_blank" >EH22_008/0004634: Mechanical engineering of biological and bio-inspired systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
ISSN
0947-8396
e-ISSN
1432-0630
Volume of the periodical
129
Issue of the periodical within the volume
9
Country of publishing house
DE - GERMANY
Number of pages
14
Pages from-to
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UT code for WoS article
001060247200006
EID of the result in the Scopus database
2-s2.0-85169607654