Superluminal-subluminal orbital angular momentum femtosecond laser focusn
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00551284" target="_blank" >RIV/68378271:_____/21:00551284 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0326728" target="_blank" >http://hdl.handle.net/11104/0326728</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OE.439377" target="_blank" >10.1364/OE.439377</a>
Alternative languages
Result language
angličtina
Original language name
Superluminal-subluminal orbital angular momentum femtosecond laser focusn
Original language description
The interplay between the frequency chirping of a broadband laser pulse and the longitudinal chromatic aberration of a focusing optic introduces the superluminal or subluminal behavior to a laser focus. In this paper, we present an analytic expression for an electric field describing a superluminal or subluminal femtosecond laser focus with orbital angular momentum. The analytic expression for a superluminal or subluminal laser focus is obtained through a diffraction integral, in which the focal length is replaced by a time-dependent focal length under the paraxial approximation, and the Fourier transformation. The speed and pulse duration of a laser focus are determined by the total group delay dispersion and a chromaticity parameter defined by the longitudinal chromatic aberration of a dispersive focusing optic. It is shown that it is possible to generate a several femtosecond superluminal orbital angular momentum laser focus in the focal region.
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
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/EF15_003%2F0000449" target="_blank" >EF15_003/0000449: High Field Initiative</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
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
29
Issue of the periodical within the volume
20
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
31665-31679
UT code for WoS article
000702060000056
EID of the result in the Scopus database
2-s2.0-85115446510