Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Andriy Shevchenko"'
Publikováno v:
New Journal of Physics, Vol 26, Iss 2, p 023050 (2024)
Coupling between multipolar modes of different orders has not been investigated in depth, despite its fundamental and practical relevance in the context of optical metamaterials and metasurfaces. Here, we use an electromagnetic multipole expansion of
Externí odkaz:
https://doaj.org/article/0b818290280242b78dbd8677b68e80af
Autor:
Evgeniia Ponomareva, Andriy Shevchenko
Publikováno v:
Physical Review Accelerators and Beams, Vol 26, Iss 6, p 061301 (2023)
Plasma waves can be used to create efficient and small-sized electron accelerators. Despite the already demonstrated success in reaching GeV-scale energy gain in the motion of electrons, laser-induced wakefields still suffer from the transverse sprea
Externí odkaz:
https://doaj.org/article/e8b33d7ac2024310afff30f35f45b983
Autor:
Xiaorun Zang, Andriy Shevchenko
Publikováno v:
New Journal of Physics, Vol 25, Iss 11, p 113024 (2023)
Localized surface plasmons in metal nanoparticles are widely used in nano-optics to confine and enhance optical fields. It has been previously shown that, if the nanoparticles are distributed periodically, an additional enhancement can be achieved by
Externí odkaz:
https://doaj.org/article/9fe1fa899c33402da6e5ac0bf3f076b3
Publikováno v:
APL Photonics, Vol 4, Iss 7, Pp 076101-076101-8 (2019)
While nanoscale local enhancement of fluorescence is a well-studied phenomenon, enhancement of far-field radiation of large-area samples using nanostructures has been explored much less. In this work, we demonstrate planar nanostructures with excepti
Externí odkaz:
https://doaj.org/article/a09a44f49c3944869f76aca53713d2a1
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 042043 (2020)
Electromagnetic anapoles are nonradiating oscillations of electric charge. They are known to be formed by a combination of an ordinary and a toroidal multipole. In this work, we introduce a different family of anapoles based on a Cartesian electric-c
Externí odkaz:
https://doaj.org/article/dfc9036d5a834838b897b09b0ff69557
Measurement of intensity and polarization beatings in the interference of independent optical fields
Autor:
Andriy Shevchenko, Tero Setälä
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 012053 (2020)
We experimentally study the intensity and polarization beatings of interfering independent optical fields. Using the tools of intensity interferometry, we measure the beating harmonicity time and the degree of randomness of the polarization beating f
Externí odkaz:
https://doaj.org/article/a38bf80a37914c0ca4af488e0b88013f
Autor:
Antti Hannonen, Kimmo Saastamoinen, Lasse-Petteri Leppänen, Matias Koivurova, Andriy Shevchenko, Ari T Friberg, Tero Setälä
Publikováno v:
New Journal of Physics, Vol 21, Iss 8, p 083030 (2019)
Beating is a simple physical phenomenon known for long in the context of sound waves but remained surprisingly unexplored for light waves. When two monochromatic optical beams of different frequencies and states of polarization interfere, the polariz
Externí odkaz:
https://doaj.org/article/afa1058bb4ca4dea90a29394963392ea
Autor:
Victor Ovchinnikov, Andriy Shevchenko
Publikováno v:
Journal of Chemistry, Vol 2013 (2013)
A cost-effective fabrication of random noble-metal nanostructures with a feature size of the order of 10 nm on a large-area dielectric substrate is described. The method combines dry etching of the substrate through a self-organized metal mask with a
Externí odkaz:
https://doaj.org/article/ed501d41513c4bb6959779063444a473
Autor:
Mykola M. Tkachuk, Anton Zavorotnii, Olena Zinchenko, Andrey Grabovskiy, Mykola А. Tkachuk, Nataliya Pinchuk, Andriy Shevchenko, Heorgii Tsendra
Publikováno v:
Bulletin of the National Technical University «KhPI» Series: Engineering and CAD. :80-93
The analysis of materials on approaches, methods and models of research of strength and durability of torsion shafts of systems of suspension of light armored vehicle is carried out. It is concluded that despite the existing significant theoretical d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::693280879ac32b24eab517634d507b72
https://doi.org/10.20998/2079-0775.2022.2.09
https://doi.org/10.20998/2079-0775.2022.2.09
Autor:
Mykola M. Tkachuk, Andrey Grabovskiy, Mykola Prokopenko, Oleksandr Shut, Nataliya Pinchuk, Mykola А. Tkachuk, Illia Klochkov, Andrii Lipeiko, Heorgii Tsendra, Andriy Shevchenko, Andrii Koba
Publikováno v:
Bulletin of the National Technical University «KhPI» Series: Engineering and CAD. :64-79
In the work, theoretical foundations of behavior analysis of elastic bushings of modern engines high-speed elements under load were created. Several variation settings are offered. The first one of them is based on the model of a thin ring. The secon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98718b11c4ee44bc77b3b5490ababde2
https://doi.org/10.20998/2079-0775.2022.2.08
https://doi.org/10.20998/2079-0775.2022.2.08