Initiation of air ionization by ultrashort laser pulses: evidence for a role of metastable-state air molecules
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00492634" target="_blank" >RIV/68378271:_____/18:00492634 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15310/18:73591912
Result on the web
<a href="http://dx.doi.org/10.1088/1361-6463/aac56a" target="_blank" >http://dx.doi.org/10.1088/1361-6463/aac56a</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6463/aac56a" target="_blank" >10.1088/1361-6463/aac56a</a>
Alternative languages
Result language
angličtina
Original language name
Initiation of air ionization by ultrashort laser pulses: evidence for a role of metastable-state air molecules
Original language description
Transmission measurements for femtosecond laser pulses focused in air with spectral analysis of emission from the focal region have been carried out for various pulse energies and air pressures. The air breakdown threshold and pulse attenuation due to plasma absorption arc evaluated and compared with calculations based on the multiphoton ionization model. The plasma absorption is found to depend on the pulse repetition rate and is considerably stronger at 1 kHz than at 1-10 Hz. This suggests that accumulation of metastable states of air molecules plays an important role in initiation of air breakdown, enhancing the ionization efficiency at high repetition rates. Possible channels of metastable-state-assisted air ionization and the role of the observed accumulation effect in laser material processing are discussed.
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
10306 - Optics (including laser optics and quantum optics)
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
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physics D-Applied Physics
ISSN
0022-3727
e-ISSN
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Volume of the periodical
51
Issue of the periodical within the volume
25
Country of publishing house
GB - UNITED KINGDOM
Number of pages
6
Pages from-to
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UT code for WoS article
000433925000002
EID of the result in the Scopus database
2-s2.0-85048225927