Article 7224

Title of the article

Fractal graphene patch plasmon-polariton nanoantenna for near infrared and optical frequency ranges 

Authors

Rudol'f A. Brazhe, Doctor of physical and mathematical sciences, professor, head of the subdepartment of physics, Ulyanovsk State Technical University (32 Severniy Venets street, Ulyanovsk, Russia),  brazhe@ulstu.ru,
Egor Yu. Lebedev, Student, Ulyanovsk State Technical University (32 Severniy Venets street, Ulyanovsk, Russia),  lebedev.egor@ulsk173.ru

Abstract

Background. Due to their multi- and broadband, miniaturization and planar design, fractal patch nanoantennas are widely used in wireless communication system in the gigahertz frequency range. There are successful attempts to use them also at terahertz and optical frequencies. In this case, graphene is very promising material for the patch due to its high electrical conductivity and the convenience of exciting surface plasmon-polariton waves. In this regard, the purpose of the study is to design a fractal graphene plasmonpolariton patch nanoantenna for operation in the near IR and optical part of the electromagnetic wave spectrum and mathematical modeling of its characteristics. Materials and methods. A graphene patch in the form of a triangular Sierpinski gasket in the 4th iteration on a dielectric substate of silicon carbide, gallium arsenide or quartz deposited on a metal ground electrode is proposed. A gate voltage is applied between the patch and the grounded electrode to shift the Fermi level in graphene relative to the Dirac point. In the theoretical part of the work, well-known provisions from graphene physics, fractal theory and microwave electronics and antenna-feeder technology are used. The simulation was performed using the Microwave Studio software package. Results. For the reference model of a nanoantenna with a graphene fractal patch in the form of a Sierpinski triangle in the 4th iteration with a side of a large triangle of 625 nm on the dielectric substrate of silicon carbide with a thickness of 10 nm, the following results were obtained: resonant frequencies is – 204 THz, 356 THz, 583 THz, 912 THz, 1294 THz; VSWR – no higher than 1.7; the input impedance is from 29 to 42 Ω. The maximum gain (at the frequency of 583 THz) reaches a value of 7.43 dB, the angular width of the main lobe is 91.8 º, the level of the side lobes is  9.1 dBm less than the level of the main lobe. In order to optimize the material and thickness on them has been studied. Conclusion. The possibility of creating fractal patch nanoantennas on graphene for operation in the near-infrared and optical part of electromagnetic radiation is shown. The results of the work can be used in the design of these antennas and the calculation of their characteristics.

Key words

fractal patch nanoantennas, graphene, scattering parameter, standing wave ratio, input impedance, emission pattern

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For citation:

Brazhe R.A., Lebedev E.Yu. Fractal graphene patch plasmon-polariton nanoantenna for near infrared and optical frequency ranges. Izvestiya vysshikh uchebnykh zavedeniy. Povolzhskiy region. Tekhnicheskie nauki = University proceedings. Volga region. Engineering sciences. 2024;(2):98–111. (In Russ.). doi: 10.21685/2072-3059-2024-2-7

 

Дата создания: 04.10.2024 11:13
Дата обновления: 17.10.2024 14:43
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