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Information × Registration Number 0221U104573, 0120U104419 , R & D reports Title Terahertz graphene-based metasurfaces and transmitarrays popup.stage_title Head Nosych Oleksandr Yo., Доктор фізико-математичних наук Registration Date 01-04-2021 Organization O. Ya. Usikov Institute for Radiophysics and Electronics NAS of Ukraine popup.description2  The work on the project was performed in accordance with the requirements of the Terms of Reference for 2020. This included systematic numerical analysis of several most promising configurations of graphene metasurfaces built on the finite and infinite gratings of graphene strips placed on the dielectric substrates. In particular, we studied the effect of the substrate thickness and material and the grating period on the characteristics of the terahertz wave scattering and absorption by such metasurfaces. The simulations were performed using the singular integral equations for the current on the strips and the discretization of these equations with the aid of interpolation polynomials and quadratures. The developed numerical algorithms have mathematically guaranteed convergence, that allows to calculate the scattering and absorption of waves with controlled accuracy. This study had demonstrated that any grating of graphene strips on a dielectric slab is a composite open resonator, able to support plasmon mode, slab modes, and lattice modes. By manipulating the parameters of graphene, one can tune the frequency of plasmon-mode resonances and control the scattered and absorbed power. Based on the results of the work, 4 papers were presented at the international conferences ELNANO-2020 (Kyiv), EuMC-2019 (Utrecht) and UkrMW-2020 (2) (Kharkiv). Besides, a research paper was published in the IEEE Journal of Quantum Electronics and other two papers were submitted to the J. of the Optical society of America B and J. of Electromagnetic Waves and Applications. Product Description popup.authors Gyrya Nataliya P. Dukhopelnykov Sergii V. Kaliberda Mstyslav Ye popup.nrat_date 2021-04-01 Close