Dynamically Temperature-Voltage Controlled Multifunctional Device Based on VO2 and Graphene Hybrid Metamaterials: Perfect Absorber and Highly Efficient Polarization Converter

Metasurfaces have powerful light field manipulation capabilities, which have been extensively studied in the past few years and have developed rapidly in various fields. At present, the focus of metasurface research has shifted to the tunable functionality. In this paper, a temperature-controllable multifunctional metasurface lens based on phase transition material is designed. First of all, by controlling the temperature of the desired working area and the polarization of the incident light, switching among multiple focus, single focus, and no focus at any position can be achieved, and the intensity and helicity of the output light can be adjusted. In addition, a polarization-sensitive intensity-tunable metalens based on the P-B phase principle is designed, when the incident light is linearly polarized light, left-handed circularly polarized light, or right-handed circularly polarized light, it has the same focal point but with different light field intensities. Therefore, the focused intensity can be tunable by the polarization state of the incident light.

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“…The complex permittivity of vanadium dioxide can be given by the following dispersion relation [39][40][41]:…”

Section: Materials and Design Theorymentioning

confidence: 99%

Multifunctional Metasurface Lens With Tunable Focus Based on Phase Transition Material

Song

Liu²,

Wang

et al. 2021

Front. Phys.

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“…The maximum absorption reached as high as 99.41-99.89%. 36 Wang et al proposed a dual-tunable switchable broadband THz metamaterial absorber based on a hybrid VO 2 and graphene structure. The peak absorption of this device can be tuned from 26% to 99.2% and from 9% to 99.2% by modifying the Fermi energy of the graphene and conductivity of the VO 2 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Dual-Tunable Polarization Insensitive Electromagnetically Induced Transparency in Metamaterials

Ning

Xiao

Chen

et al. 2021

Journal of Elec Materi

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A multilayer structure of a square ring of graphene with nesting vanadium dioxide (VO2) was investigated in this study. This structure exhibits electromagnetically induced transparency (EIT), which stems from a bright mode coupling with a dark mode. The permittivity values of graphene and VO2 can be modulated via chemical potential and temperature, respectively. The EIT effect can be tuned based on the chemical potential of graphene and temperature of VO2, resulting in a dual-tunable EIT effect. Simulation results confirmed that this dual-tunable EIT phenomenon is insensitive to polarization. These results may have potential applications in terahertz devices, such as slow light devices, switching devices, and sensors.

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“…As a thermally sensitive phase change material, VO 2 is of great function for the reversible phase change in both insulating and metallic states. Exploiting the insulator-metal transition characteristics of VO 2 , lots of novel devices have been proposed, including VO 2 -based absorbers [ 31 , 32 ], tunable-focusing lenses [ 33 ], absorber-lenses [ 34 , 35 ], and perfect absorber and polarization converter bifunctional devices [ 36 ]. However, part of the multifunctional metasurfaces are implemented by changing the polarization state of the incident light, while the others change the polarization state of outgoing light.…”

Section: Introductionmentioning

confidence: 99%

A Thermal Tuning Meta-Duplex-Lens (MDL): Design and Characterization

Liang

Hao

et al. 2020

Nanomaterials

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Multifunctional metasurfaces play an important role in the development of integrated optical paths. However, some of the realizations of current multifunctional metasurface devices depend on polarization selectivity, and others change the polarization state of the outgoing light. Here, based on vanadium dioxide (VO2) phase change material, a strategy to design a meta-duplex-lens (MDL) is proposed and numerical simulation calculations demonstrate that at low temperature (about 300 K), VO2 behaves as a dielectric so that the MDL can act as a transmission lens (transmission efficiency of 87.6%). Conversely, when VO2 enters the metallic state (about 355 K), the MDL has the ability to reflect and polymerize electromagnetic waves and works as a reflection lens (reflection efficiency of 85.1%). The dielectric waveguide and gap-surface plasmon (GSP) theories are used in transmission and reflection directions, respectively. In order to satisfy the coverage of the phase gradient in the range of 2π in both cases, we set the antenna as a nanopillar with a high aspect ratio. It is notable that, via symmetrical antennas acting in concert with VO2 phase change material, the polarization states of both the incident light and the outgoing light are not changed. This reversible tuning will play a significant role in the fields of imaging, optical storage devices, communication, sensors, etc.

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Dynamically Temperature-Voltage Controlled Multifunctional Device Based on VO2 and Graphene Hybrid Metamaterials: Perfect Absorber and Highly Efficient Polarization Converter

Cited by 50 publications

References 38 publications

Multifunctional Metasurface Lens With Tunable Focus Based on Phase Transition Material

Multifunctional Metasurface Lens With Tunable Focus Based on Phase Transition Material

Dual-Tunable Polarization Insensitive Electromagnetically Induced Transparency in Metamaterials

A Thermal Tuning Meta-Duplex-Lens (MDL): Design and Characterization

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