Double-pulse-laser volumetric modification of fused silica: the effect of pulse delay on light propagation and energy deposition
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00587567" target="_blank" >RIV/68378271:_____/24:00587567 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0354700" target="_blank" >https://hdl.handle.net/11104/0354700</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OE.515766" target="_blank" >10.1364/OE.515766</a>
Alternative languages
Result language
angličtina
Original language name
Double-pulse-laser volumetric modification of fused silica: the effect of pulse delay on light propagation and energy deposition
Original language description
Volumetric modification of dielectrics by ultrashort laser pulses is a complex dynamic phenomenon involving material photoexcitation and associated nonlinear processes. To achieve control over modification, it is necessary to gain a deep insight into the dynamics of laser-excited processes that can be realized using double-laser-pulse experiments with different time separations supported by numerical simulations. In this paper, we apply this approach to investigate fused silica modification with femtosecond laser pulses that provides time-resolved information about the dynamic behavior of the laser-excited bandgap material. It is shown that the laser-generated free-electron plasma causes a shielding effect for the following pulse with a characteristic duration of ∼600 fs after the pulse action. Within this time interval, the second pulse produces a reduced modification as compared to a longer time separation between pulses. For double pulses with different energies, it was found that the volumetric modification is stronger when a lower-energy pulse couples with material first. This is explained by the combination of the effects of the re-excitation of self-trapped excitons, which are generated as a result of free electron recombination and associated light shielding. Experimental results are supported by numerical simulations of double laser pulse propagation in nonlinear media based on Maxwell’s equations. Our findings offer a route for better controlling the inscription of 3D photonic structures in bulk optical materials.
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
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
<a href="/en/project/EF15_003%2F0000445" target="_blank" >EF15_003/0000445: Advanced designing of functional materials: From mono- to BI- And TRI-chromatic excitation with tailored laser pulses</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
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
32
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
12882-12891
UT code for WoS article
001206868200004
EID of the result in the Scopus database
2-s2.0-85189007185