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Information × Registration Number 0222U003437, 0119U100300 , R & D reports Title Photonics of plasmonic nanostructures for photovoltaics and sensorics. popup.stage_title Head Dmytruk Igor M., Доктор фізико-математичних наук Registration Date 23-03-2022 Organization Taras Shevchenko National University of Kyiv popup.description2 The object of study - the carrier structures of local plasmons and collectivized plasmon mode, namely metal and metal-semiconductor self-organized nanostructures, nanoparticles of precious metals, metal-polymer nanocomposites. The aim of the work is to study the fundamental properties of localized and collective coherent electronic excitations, their interaction with visible and infrared radiation in metal-semiconductor nanostructures for their practical use in photovoltaics and sensors. Peculiarities of structures formed on the surface of metals (Ag, Au, Cu, W), alloys, semiconductors (ZnSe, GaAs, PbI2, GaSe, CdZnTe, Si) under the action of femtosecond (fs) laser radiation, in particular, the dependence of the period of laser-induced periods surface structures (LIPPS) from the laser wavelength. LIPPS on metals (Cu, Ag, W) was obtained for the first time under the action of the 3rd harmonic of the fs laser. Physical mechanisms of two-fold reduction of the LIPPS period and formation of dislocations, namely, generation of the second harmonic on surface and the formation of optical vortices in the scattered wave. The photocurrent in metal-semiconductor structures (Au nanoparticles (LF) and / or nanowires (NW) on a textured GaAs semiconductor) at photon energies, smaller width of the GaAs band gap, due to the generation of current carriers due to two-photon absorption due to local plasmons in Au LF and / or ND. For the first time at room temperature without special dyes achieved plasmonic enhancement of PL nucleotide dAMP on a hybrid metasurfaces: 1120-fold increase in PL - on the meta-surface Ag LIPS / Ag nanoprisms (NP), 1220-fold - on the meta-surface Ag LIPS / Au nanorods (NS), which is the result of excitation of collectivized plasmon mode and the formation of "hot spots" near hot spots LIPPS and Ag NP or Au NA.  Product Description popup.authors Yeshchenko Oleh А. Berezovska Nataliya I. Grabovskyi Evgen S. Degoda Volodymyr Ya. Kolodka Roman S. Kosach Vitalii V. Kudrya Vladyslav Yu. Kutovyy Serhiy Yu. Losytskyy Mykhaylo Yu. Savchk Volodymyr R. Stanovyy Oleksandr P. Teselko Petro O. popup.nrat_date 2022-03-23 Close