Dual-Band and Multi-State Polarization Conversion Using aTerahertz Symmetry-Breaking Metadevice

We numerically and experimentally demonstrate a terahertz metadevice consisting of split-ring resonators (SRRs) present within square metallic rings. This device can function as a dual-band polarization converter by breaking the symmetry of SRRs. Under x-polarized incidence, the metastructure is abl...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2023-11, Vol.13 (21), p.2844
Main Authors: Deng, Yuwang, Zhou, Qingli, Zhang, Xuteng, Zhang, Pujing, Liang, Wanlin, Ning, Tingyin, Shi, Yulei, Zhang, Cunlin
Format: Article
Language:English
Subjects:
Analysis
Asymmetry
Broken symmetry
Design
dual band
Electric fields
Frequency dependence
Graphene
Light
Linear polarization
Methods
multi state
Polarization
Polarization (Electricity)
polarization conversion
Resonators
Spectrum analysis
Symmetry
symmetry-breaking metadevice
terahertz
Terahertz frequencies
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Summary:We numerically and experimentally demonstrate a terahertz metadevice consisting of split-ring resonators (SRRs) present within square metallic rings. This device can function as a dual-band polarization converter by breaking the symmetry of SRRs. Under x-polarized incidence, the metastructure is able to convert linearly polarized (LP) light into a left-hand circular-polarized (LCP) wave. Intriguingly, under y-polarized incidence, frequency-dependent conversion from LP to LCP and right-hand circular-polarized (RCP) states can be achieved at different frequencies. Furthermore, reconfigurable LCP-to-LP and RCP-to-LP switching can be simulated by integrating the device with patterned graphene and changing its Fermi energy. This dual-band and multi-state polarization control provides an alternative solution to developing compact and multifunctional components in the terahertz regime.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano13212844