Determination of the spectral variation origin in high-order harmonic generation in noble gases

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F18%3A00329287" target="_blank" >RIV/68407700:21340/18:00329287 - isvavai.cz</a>

Result on the web

<a href="https://journals.aps.org/pra/abstract/10.1103/PhysRevA.98.033414" target="_blank" >https://journals.aps.org/pra/abstract/10.1103/PhysRevA.98.033414</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Determination of the spectral variation origin in high-order harmonic generation in noble gases

Original language description

One key parameter in the high-order harmonic generation (HHG) phenomenon is the exact frequency of the generated harmonic field. Its deviation from perfect harmonics of the laser frequency can be explained considering (i) the single-atom laser-matter interaction and (ii) the spectral changes of the driving laser. In this work, we perform an experimental and theoretical study of the causes that generate spectral changes in the HHG radiation. We measured the driving laser spectral shift after high harmonic generation in long medium using a correction factor to take into account the multiple possible HHG initiation distances along the laser path. We separate out the contribution of laser spectral shift from the resultant high harmonic spectral shift in order to elucidate the microscopic effect of spectral shift in HHG. Therefore, in some cases we are able to identify the dominant electron trajectory from the experimental data. Our investigations lead to valuable conclusions about atomic dipole phase contribution to a high harmonic spectral shift. We demonstrate that the significant contribution of a long electron path leads to a high harmonic shift, which differs from that expected from the driving laser. Moreover, we assess the origin of the high-order harmonics spectral broadening and provide an explanation for the narrowest high harmonic spectral width in our experiment.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2018

Confidentiality

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

Name of the periodical

Physical Review A

ISSN

1050-2947

e-ISSN

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Volume of the periodical

98

Issue of the periodical within the volume

033414

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

"033414-1"-"033414-10"

UT code for WoS article

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EID of the result in the Scopus database

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