Photon energy dependence of graphitization threshold for diamond irradiated with an intense XUV FEL pulse

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00395857" target="_blank" >RIV/68378271:_____/13:00395857 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/13:00206785

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.88.060101" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.88.060101</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.88.060101" target="_blank" >10.1103/PhysRevB.88.060101</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Photon energy dependence of graphitization threshold for diamond irradiated with an intense XUV FEL pulse

Popis výsledku v původním jazyce

We studied experimentally and theoretically the structural transition of diamond under an irradiation with an intense femtosecond extreme ultraviolet laser (XUV) pulse of 24?275 eV photon energy provided by free-electron lasers. Experimental results obtained show that the irradiated diamond undergoes a solid-to-solid phase transition to graphite, and not to an amorphous state. Our theoretical findings suggest that the nature of this transition is nonthermal, stimulated by a change of the interatomic potential triggered by the excitation of valence electrons. Ultrashort laser pulse duration enables to identify the subsequent steps of this process: electron excitation, band gap collapse, and the following atomic motion. A good agreement between the experimentally measured and theoretically calculated damage thresholds for the XUV range supports our conclusions.

Název v anglickém jazyce

Photon energy dependence of graphitization threshold for diamond irradiated with an intense XUV FEL pulse

Popis výsledku anglicky

We studied experimentally and theoretically the structural transition of diamond under an irradiation with an intense femtosecond extreme ultraviolet laser (XUV) pulse of 24?275 eV photon energy provided by free-electron lasers. Experimental results obtained show that the irradiated diamond undergoes a solid-to-solid phase transition to graphite, and not to an amorphous state. Our theoretical findings suggest that the nature of this transition is nonthermal, stimulated by a change of the interatomic potential triggered by the excitation of valence electrons. Ultrashort laser pulse duration enables to identify the subsequent steps of this process: electron excitation, band gap collapse, and the following atomic motion. A good agreement between the experimentally measured and theoretically calculated damage thresholds for the XUV range supports our conclusions.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Physical Review. B

ISSN

1098-0121

e-ISSN

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Svazek periodika

88

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

"060101-1"-"060101-4"

Kód UT WoS článku

000322812700001

EID výsledku v databázi Scopus

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