Formation of tubular structures and microneedles on silicon surface by doughnut-shaped ultrashort laser pulses

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00557026" target="_blank" >RIV/68378271:_____/22:00557026 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/22:10447260
Result on the web
<a href="https://doi.org/10.1016/j.apsusc.2022.153228" target="_blank" >https://doi.org/10.1016/j.apsusc.2022.153228</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apsusc.2022.153228" target="_blank" >10.1016/j.apsusc.2022.153228</a>

Result language
angličtina
Original language name
Formation of tubular structures and microneedles on silicon surface by doughnut-shaped ultrashort laser pulses
Original language description
Highly deterministic surface processing is ensured by single-shot ablative modification of the sample surface using radially polarized doughnut-shaped laser pulses with duration of 70 fs.Under such conditions,well reproducible tubular structures are formed whose height is rising with increasing fluence,culminating by closing the structure on the top with formation of a microneedle with a cavity in its base.Upon multi-pulsed irradiation,the height of the needle structures can further increase as compared to those produced by single pulses and top part of the structure is flattened.At a certain number of pulses,melting and ablation cause collapsing the entire structure.The mechanisms responsible for creating the tubular and needle structures are discussed based on the careful analysis of the experimental observations.The generated silicon microtubes and needles can find applications in various fields.
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
10306 - Optics (including laser optics and quantum optics)

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
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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