Zobrazeno 1 - 10 of 34 pro vyhledávání: '"Lukáš Ondič"'
1
Akademický článek
Silicon-Vacancy Centers in Ultra-Thin Nanocrystalline Diamond Films
Autor: Stepan Stehlik, Lukas Ondic, Marian Varga, Jan Fait, Anna Artemenko, Thilo Glatzel, Alexander Kromka, Bohuslav Rezek
Publikováno v: Micromachines, Vol 9, Iss 6, p 281 (2018)
Color centers in diamond have shown excellent potential for applications in quantum information processing, photonics, and biology. Here we report the optoelectronic investigation of shallow silicon vacancy (SiV) color centers in ultra-thin (7–40 n
Externí odkaz: https://doaj.org/article/330af80b454342e991cc8cb776863a85
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2
Akademický článek
Two-dimensional photonic crystals increasing vertical light emission from Si nanocrystal-rich thin layers
Autor: Lukáš Ondič, Marian Varga, Ivan Pelant, Alexander Kromka, Karel Hruška, Robert G. Elliman
Publikováno v: Beilstein Journal of Nanotechnology, Vol 9, Iss 1, Pp 2287-2296 (2018)
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
Externí odkaz: https://doaj.org/article/85a57e15cc3049abb14dc15d620917c6
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3
Light emission dynamics of silicon vacancy centers in a polycrystalline diamond thin film
Autor: František Trojánek, Karol Hamráček, Martin Hanák, Marián Varga, Alexander Kromka, Oleg Babčenko, Lukáš Ondič, Petr Malý
Publikováno v: Nanoscale. 15:2734-2738
The photoluminescence decay dynamics of silicon vacancy centers in a polycrystalline diamond film indicate that they are not linked with other defects of the film, thereby opening the door for their application in diamond photonics or sensing.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3e7af6f141a2ccd8dfc6aab7d2a40cdd
https://doi.org/10.1039/d2nr05470a
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5
Spectral tuning of diamond photonic crystal slabs by deposition of a thin layer with silicon vacancy centers
Autor: Jan Fait, Marian Varga, Alexander Kromka, Lukáš Ondič, Bohuslav Rezek, Karel Hruska
Publikováno v: Nanophotonics, Vol 10, Iss 15, Pp 3895-3905 (2021)
The controlled extraction of light from diamond optical color centers is essential for their practical prospective applications as single photon sources in quantum communications and as biomedical sensors in biosensing. Photonic crystal (PhC) structu
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::934ea8d2a2e1a57e83d0cd7af22420c5
https://doi.org/10.1515/nanoph-2021-0369
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7
Laser-Induced Modification of Hydrogenated Detonation Nanodiamonds in Ethanol
Autor: Lukáš Ondič, Zuzana Nemeckova, Irena Bydzovska, Ivan Gordeev, Ekaterina Shagieva, Stepan Stehlik, Alexander Kromka, Oleksandr Romanyuk, Jiri Henych
Publikováno v: Nanomaterials
Nanomaterials, Vol 11, Iss 2251, p 2251 (2021)
Volume 11
Issue 9
Apart from the frequently used high-temperature annealing of detonation nanodiamonds (DNDs) in an inert environment, laser irradiation of DNDs in a liquid can be effectively used for onion-like carbon (OLC) formation. Here, we used fully de-aggregate
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b81fb212adc92525b42982299220060
http://europepmc.org/articles/PMC8472243
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8
Charge Carrier Injection Electroluminescence with CO-Functionalized Tips on Single Molecular Emitters
Autor: Jiří Doležal, Lukáš Ondič, Pablo Merino, Jesús Redondo, Aleš Cahlík, Martin Švec
Publikováno v: Nano Lett
We investigate electroluminescence of single molecular emitters on NaCl on Ag(111) and Au(111) with submolecular resolution in a low-temperature scanning probe microscope with tunneling current, atomic force and light detection capabilities. Role of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94827957eb57031bd92be9a5cb02f159
https://doi.org/10.1021/acs.nanolett.9b03180
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9
Maximized vertical photoluminescence from optical material with losses employing resonant excitation and extraction of photonic crystal modes
Autor: Jan Fait, Marian Varga, Alexander Kromka, Zdeněk Remeš, Vlastimil Jurka, Lukáš Ondič, Bohuslav Rezek, Karel Hruska
Publikováno v: Nanophotonics, Vol 8, Iss 6, Pp 1041-1050 (2019)
Optical losses of a host material together with the total internal reflection phenomenon can significantly reduce photoluminescence external quantum efficiency of embedded light-emitters. This is not only the case for light-emitting color centers in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::868eada6d2a3cc0cbdd09fb9ccfe7b60
http://www.degruyter.com/view/j/nanoph.2019.8.issue-6/nanoph-2019-0042/nanoph-2019-0042.xml?format=INT
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10
Microsphere lithography for scalable polycrystalline diamond-based near-infrared photonic crystals fabrication
Autor: Marian Varga, Lenka Gajdošová, Mária Domonkos, Alexander Kromka, Lukáš Ondič
Publikováno v: Materials & Design, Vol 139, Iss, Pp 363-371 (2018)
We demonstrate the fabrication of a polycrystalline diamond-based two-dimensional photonic crystal (PhC) slab using microsphere lithography (MSL). First, the essential issues of MSL on rough diamond surfaces are demonstrated. The peak-to-valley value
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5e93b4fc5914d652c115a4a24b14d0f
http://www.sciencedirect.com/science/article/pii/S0264127517310201
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