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Importance of layer thermal conductivity on the sharpness of patterns produced by laser interference
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SYSNO ASEP 0474074 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Importance of layer thermal conductivity on the sharpness of patterns produced by laser interference Author(s) Peláez, R.J. (ES)
Afonso, C.N. (ES)
Škereň, M. (CZ)
Bulíř, Jiří (FZU-D) RID, ORCID, SAINumber of authors 4 Source Title Applied Surface Science. - : Elsevier - ISSN 0169-4332
Roč. 374, Jun (2016), s. 61-64Number of pages 4 s. Language eng - English Country NL - Netherlands Keywords dewetting ; laser interference ; metal layers ; nanoparticles ; thermal conductivity Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Institutional support FZU-D - RVO:68378271 UT WOS 000375937300011 EID SCOPUS 84942068484 DOI 10.1016/j.apsusc.2015.09.110 Annotation In this work, we compare patterns produced in Ag layers having similar thickness in the range 8.3-10.8 nm but having different initial nanostructure, i.e. behaving either as discontinuous or continuous layers and thus having very different thermal conductivities. The patterns are produced by exposing a phase mask to an excimer laser operating at 193 nm and using a projection optics that leads to similar fringed patterns with periods in the range 6.3-6.7 μm. The layer breaks up into isolated NPs due to laser induced melting at the regions around the intensity maxima sites. The resulting fringes have sharp interfaces in the case of discontinuous layers while a variety of regions across the pattern with no sharp interfaces are produced in the case of continuous layers. The results show that while the temperature distribution across the pattern matches almost perfectly the laser beam intensity profile for the former case, it becomes smeared due to lateral heat flow for the latter case.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
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