Intensity mediated change in the sign of ultrafast third-order nonlinear optical response in As2S2 thin films

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912752" target="_blank" >RIV/00216275:25310/18:39912752 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1364/OL.43.004787" target="_blank" >http://dx.doi.org/10.1364/OL.43.004787</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OL.43.004787" target="_blank" >10.1364/OL.43.004787</a>

Result language
angličtina
Original language name
Intensity mediated change in the sign of ultrafast third-order nonlinear optical response in As2S2 thin films
Original language description
We study experimentally and theoretically the intensity-dependent off-resonant ultrafast third-order nonlinear optical response of As2S2 thin films. At low intensity, we observed saturable absorption with a negative (self-defocusing) nonlinear refractive index (n(2)) which at higher intensity switched over to reverse saturable absorption with a change in the sign of n(2) to positive (self-focusing). The results were explained with the help of time-resolved measurements and rigorous theoretical and numerical simulations.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
<a href="/en/project/GA16-17921S" target="_blank" >GA16-17921S: Heterostructures based on chalcogenides for nonlinear optics and optical sensors</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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