Manipulating electromagnetic waves on graphene-based optical device with mixer application: equivalent circuit model approach

In this paper, a simple structure benefits from biased graphene rings with a nonlinear THz wave mixer application. According to the impedance matching concept, the device impedance is set to minimize absorption while transmission and reflection channels can be considered as outputs. Exploiting both...

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Bibliographic Details
Published in:Indian journal of physics 2024-05, Vol.98 (5), p.1827-1832
Main Authors: Khani, Amir Ali Mohammad, Rezaei, Ilghar, Soldoozy, Ali, Aghaee, Toktam
Format: Article
Language:English
Subjects:
Astrophysics and Astroparticles
Bias
Channels
Electromagnetic radiation
Equivalent circuits
Graphene
Impedance matching
Medical imaging
Original Paper
Physics
Physics and Astronomy
Terahertz frequencies
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Summary:In this paper, a simple structure benefits from biased graphene rings with a nonlinear THz wave mixer application. According to the impedance matching concept, the device impedance is set to minimize absorption while transmission and reflection channels can be considered as outputs. Exploiting both full wave approach and equivalent circuit model simulations results in two distinct sources involving 1–2 THz and 4–6 THz simultaneously while different biases result in multiple functionalities. Interestingly both output channels show some frequencies between 2 and 4 THz which are produced by the nonlinear intrinsic resonance of the device and intervention caused by two distinct source radiations. The presented structure can be considered as an adjustable device to manipulate THz waves regarding transmitting and reflection. Such a simple and sensitive structure to external bias stimulation is in great demand for medical imaging, security, indoor communication, and wave detection sensors.
ISSN:0973-1458
0974-9845
DOI:10.1007/s12648-023-02942-2