Quantum and quasi-classical effects in the strong field ionization and subsequent excitation of nitrogen molecules
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00572554" target="_blank" >RIV/68378271:_____/22:00572554 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0343207" target="_blank" >https://hdl.handle.net/11104/0343207</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OE.469492" target="_blank" >10.1364/OE.469492</a>
Alternative languages
Result language
angličtina
Original language name
Quantum and quasi-classical effects in the strong field ionization and subsequent excitation of nitrogen molecules
Original language description
The processes leading to the N-2(+) lasing are rather complex and even the population distribution after the pump laser excitation is unknown. In this paper, we study the population distribution at electronic and vibrational levels in N-2(+) driven by ultra-short laser pulse at the wavelengths of 800 nm and 400 nm by using the quantum-mechanical time-domain incoherent superposition model based on the time-dependent Schrodinger equation and the quasi-classical model assuming instantaneous ionization injection described by density matrix. It is shown that while both models provide qualitatively similar results, the quasi-classical instantaneous ionization injection model underestimates the population inversions corresponding to the optical transitions at 391 nm, 423 nm and 428 nm due to the assumption of quantum mixed states at the ionization time. A fast and accurate correction to this error is proposed.
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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Optics Express
ISSN
1094-4087
e-ISSN
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Volume of the periodical
30
Issue of the periodical within the volume
21
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
38481
UT code for WoS article
000901198200003
EID of the result in the Scopus database
2-s2.0-85139425636