Rajesh Yadav, Harsha Mann, V. S. Pandey, Preeti Verma
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引用次数: 0
Abstract
This paper presents surface plasmon polaritons in graphene material–based reconfigurable antennae for advanced environmental monitoring applications. The antenna consists of multiple elements which are made up of graphene material. It enhances the antenna’s performance, enabling tunability and adaptability in response to environmental conditions. Additionally, the defective ground structure has been incorporated into the antenna characteristics that contribute to improving the radiation patterns and frequency selectivity. The proposed antenna is excited through a silver nanostrip feedline coupled through vias to the radiated elements. The antenna is resonating at 5.046 THz, with a bandwidth of 7.611 \(\mathbf{\%}\) (5.21–4.828 THz). The reconfigurable antenna provides an acceptable limit of directivity along with high efficiency. Here, the reconfigurability is obtained by disabling and enabling the topmost radiating elements systematically. Moreover, the resonant frequency can be adjusted by modifying the external biasing voltage applied to the graphene material. The antenna generates the higher-order \({\mathrm{TM}}_{65}\) mode. Furthermore, a parametric analysis has been conducted to achieve impedance matching and antenna tuning by changing the external bias voltage applied to graphene elements. The proposed reconfigurable antenna system demonstrates promising capabilities for versatile environmental sensing applications including monitoring parameters such as temperature, humidity, and pollutant levels.
期刊介绍:
Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons.
Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.