Quantum and quasi-classical effects in the strong field ionization and subsequent excitation of nitrogen molecules

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantum and quasi-classical effects in the strong field ionization and subsequent excitation of nitrogen molecules

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Quantum and quasi-classical effects in the strong field ionization and subsequent excitation of nitrogen molecules

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Optics Express

ISSN

1094-4087

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

38481

Kód UT WoS článku

000901198200003

EID výsledku v databázi Scopus

2-s2.0-85139425636