A Tunable Terahertz Graphene Metamaterial Sensor Based on Dual Polarized Plasmon-Induced Transparency

We present a terahertz graphene metamaterial sensor based on dual polarized plasmon-induced transparency caused by the destructive interference between the bright mode and the two quasi-dark modes in the terahertz (THz) band. In addition, the sensor can achieve frequency modulation by adjusting the...

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Bibliographic Details
Published in:IEEE sensors journal 2022-07, Vol.22 (14), p.14084-14090
Main Authors: Chen, Tao, Liang, Dihan, Jiang, Weijie
Format: Article
Language:English
Subjects:
Couplings
Directional sensitivity
Dual polarization
Dual polarization (waves)
Frequency modulation
Graphene
Metamaterials
Optical fiber sensors
plasmon-induced transparency
Polarization
Refractivity
Resonant frequency
Sensitivity
Sensors
Spectra
Terahertz frequencies
terahertz sensor
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Summary:We present a terahertz graphene metamaterial sensor based on dual polarized plasmon-induced transparency caused by the destructive interference between the bright mode and the two quasi-dark modes in the terahertz (THz) band. In addition, the sensor can achieve frequency modulation by adjusting the polarization direction of the THz wave and the Fermi level of graphene. Importantly, the sensor also has high sensitivity at each polarization direction, and the sensitivity of dual transmission peaks with x-polarization direction can reach about 1.1 THz/RIU (Refractive Index Unit). Furthermore, the theoretical results of the proposed three-particle model are in good agreement with the simulated transmission spectra. The sensor is also insensitive to the change of incident angles, and the transmission spectra of the sensor can remain roughly unchanged with the incident angle less than 60°, which is beneficial to the high-speed and high-sensitivity detection in a complex environment. Therefore, the proposed graphene metamaterial sensor exhibits numerous potential applications in THz biochemical sensing.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2022.3182322