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Two-dimensional photonic crystals increasing vertical light emission from Si nanocrystal-rich thin layers
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SYSNO ASEP 0500997 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Two-dimensional photonic crystals increasing vertical light emission from Si nanocrystal-rich thin layers Author(s) Ondič, Lukáš (FZU-D) RID, ORCID
Varga, Marián (FZU-D) RID, ORCID
Pelant, Ivan (FZU-D) RID, ORCID, SAI
Kromka, Alexander (FZU-D) RID, ORCID, SAI
Hruška, Karel (FZU-D) RID, ORCID
Elliman, R. G. (AU)Number of authors 6 Source Title Beilstein Journal of Nanotechnology. - : Beilstein - Institut zur Foerderung der Chemischen Wissenschaften - ISSN 2190-4286
Roč. 9, č. 1 (2018), s. 2287-2296Number of pages 10 s. Publication form Online - E Language eng - English Country DE - Germany Keywords leaky modes ; photoluminescence ; photonic crystals ; silicon nanocrystals Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GJ16-09692Y GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000442701000002 EID SCOPUS 85052974766 DOI 10.3762/bjnano.9.213 Annotation We have fabricated two-dimensional photonic crystals (PhCs) on the surface of Si nanocrystal-rich SiO2 layers with the goal to maximize the photoluminescence extraction efficiency in the normal direction. The fabricated periodic structures consist of columns ordered into square and hexagonal pattern with lattice constants computed such that the red photoluminescence of Si nanocrystals (SiNCs) could couple to leaky modes of the PhCs and could be efficiently extracted to surrounding air. Samples having different lattice constants and heights of columns were investigated in order to find the configuration with the best performance. The extraction enhancement within different spatial angles was evaluated by means of micro-photoluminescence spectroscopy. More than 18-fold extraction enhancement was achieved for light propagating in the normal direction and up to 22% increase in overall intensity was obtained at the spatial collection angle of 14°. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2019
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