Sub-bandgap laser-induced fluorescence in the CaF2 via a linear process

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F25%3A00616663" target="_blank" >RIV/61389013:_____/25:00616663 - isvavai.cz</a>
Alternative codes found
RIV/61389021:_____/25:00616663
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0022231324005878?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022231324005878?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jlumin.2024.121023" target="_blank" >10.1016/j.jlumin.2024.121023</a>

Result language
angličtina
Original language name
Sub-bandgap laser-induced fluorescence in the CaF2 via a linear process
Original language description
Calcium fluoride (CaF2) is an excellent material for deep-ultraviolet optics. However, exposure to intense UV laser light can induce new defects in the material, a phenomenon known as laser-induced fluorescence (LIF). In our study, a femtosecond laser with a wavelength of 257 nm (4.82 eV, i.e., below CaF2 bandgap) was used to induce the LIF. We thoroughly studied the phenomenon behind the photoluminescence (PL) and its variation. Based on its linear excitation intensity dependence, we assigned the PL below 3.4 eV to sub-bandgap defect emission. The rate of LIF in this spectral region also scaled linearly with the irradiation pulse intensity. At the same time, the LIF rate was strongly dependent on the repetition rate. Our results suggest that laser-induced heating is responsible for the observed PL changes. We rationalized our observations based on the formation of F- and M-centres in CaF2.
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
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OECD FORD branch
10404 - Polymer science

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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