Design and Numerical Modeling of Terahertz Metasurface with Dual Functions of Sensing and Filtering

This study proposes a dual-functional terahertz device based on the Dirac semimetal, serving as both a sensing element and a band-pass filter. The device's operating mode can switch between these two functions by utilizing the phase transition property of vanadium dioxide (VO ). When VO is in t...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2024-07, Vol.24 (15), p.4823
Main Authors: Zhang, Lu, Sun, Huayan, Chen, Zhe, Tang, Runfeng, Yang, Jinxiao, Li, Weilin
Format: Article
Language:English
Subjects:
Boundary conditions
Design
Electric waves
Electromagnetic radiation
Electromagnetic waves
Electrons
Energy
filter
Graphene
metasurface
multifunction
sensing element
Sensors
terahertz
Citations: Items that this one cites
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Summary:This study proposes a dual-functional terahertz device based on the Dirac semimetal, serving as both a sensing element and a band-pass filter. The device's operating mode can switch between these two functions by utilizing the phase transition property of vanadium dioxide (VO ). When VO is in the insulating state, the device functions as a sensing element. The simulation results demonstrate an impressive refractive index sensitivity of 374.40 GHz/RIU (Refractive Index Unit). When VO is in the metallic state, the device functions as a band-pass filter, exhibiting a center frequency of 2.01 THz and a 3 dB fractional bandwidth of 0.91 THz. The integration of these dual functionalities within a single terahertz device enhances its utility in both sensing and filtering applications.
ISSN:1424-8220
1424-8220
DOI:10.3390/s24154823