Dynamic Absorption Enhancement and Equivalent Resonant Circuit Modeling of Tunable Graphene-Metal Hybrid Antenna

Sensors
Zaka UllahSaeed Ahmed Magsi

Abstract

Plasmonic antennas are attractive optical components of the optoelectronic devices, operating in the far-infrared regime for sensing and imaging applications. However, low optical absorption hinders its potential applications, and their performance is limited due to fixed resonance frequency. In this article, a novel gate tunable graphene-metal hybrid plasmonic antenna with stacking configuration is proposed and investigated to achieve tunable performance over a broad range of frequencies with enhanced absorption characteristics. The hybrid graphene-metal antenna geometry is built up with a hexagon radiator that is supported by the Al2O3 insulator layer and graphene reflector. This stacked structure is deposited in the high resistive Si wafer substrate, and the hexagon radiator itself is a sandwich structure, which is composed of gold hexagon structure and two multilayer graphene stacks. The proposed antenna characteristics i.e., tunability of frequency, the efficiency corresponding to characteristics modes, and the tuning of absorption spectra, are evaluated by full-wave numerical simulations. Besides, the unity absorption peak that was realized through the proposed geometry is sensitive to the incident angle of TM-polarized i...Continue Reading

References

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Citations

Sep 18, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Muhammad JunaidMuhammad Aadil Siddiqui
Aug 17, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Muhammad JunaidFahad Usman
Sep 11, 2021·Scientific Reports·K A DomprehM Amekpewu

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Methods Mentioned

BETA
biosensing
surface plasmon resonance
electron scattering

Software Mentioned

CST
AWR
CST studio

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