Dual-function tuneable asymmetric transmission and polarization converter in terahertz region

Zhang, Huiyun; Yang, Chuanhao; Li, Meng; Zhang, Yuping

doi:10.1016/j.rinp.2021.104242

Cited by 40 publications

(14 citation statements)

References 40 publications

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“…A linearly polarized plane wave is incident on the designed metamaterial device in the ÀZ direction, with the X and Y directions configured as unit cells to simulate an infinite series, and the Z direction set as open (add space). At terahertz frequencies, the optical dielectric constant of VO 2 can be described using the Drude model: 21,[23][24][25][26] eðoÞ…”

Section: Design and Methodsmentioning

confidence: 99%

Realization of multifunctional transformation based on the vanadium dioxide-assisted metamaterial structure

Weng,

Yan,

Qiu

et al. 2024

Phys. Chem. Chem. Phys.

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Section: Design and Methodsmentioning

confidence: 99%

Realization of multifunctional transformation based on the vanadium dioxide-assisted metamaterial structure

Weng,

Yan,

Qiu

et al. 2024

Phys. Chem. Chem. Phys.

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“…Based on the VO 2 transition from an insulator dielectric state to a metal state and the tunable of DSM Fermi energy, several multi-functional metamaterial structures are designed to integrate different functions into a single metamaterial structure, including LTL and LTC polarization converter [176], asymmetric transmission and dual-directional absorption [177], polarization conversion and reflection device [178], different absorption characteristics [19], and so on. In Figure 18a, Y. P. Zhang et al designed a dual-function metamaterial structure treating DSM and VO 2 material [176]. When VO 2 is in insulator state, the structure can be used as an asymmetric transmission device to realize a broadband LTL polarization conversion with the PCR reaches 99% in 2.023-5.971 THz.…”

Section: Combination Of Different Functional Materialsmentioning

confidence: 99%

A Review: The Functional Materials-Assisted Terahertz Metamaterial Absorbers and Polarization Converters

et al. 2022

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When metamaterial structures meet functional materials, what will happen? The recent rise of the combination of metamaterial structures and functional materials opens new opportunities for dynamic manipulation of terahertz wave. The optical responses of functional materials are greatly improved based on the highly-localized structures in metamaterials, and the properties of metamaterials can in turn be manipulated in a wide dynamic range based on the external stimulation. In the topical review, we summarize the recent progress of the functional materials-based metamaterial structures for flexible control of the terahertz absorption and polarization conversion. The reviewed devices include but are not limited to terahertz metamaterial absorbers with different characteristics, polarization converters, wave plates, and so on. We review the dynamical tunable metamaterial structures based on the combination with functional materials such as graphene, vanadium dioxide (VO2) and Dirac semimetal (DSM) under various external stimulation. The faced challenges and future prospects of the related researches will also be discussed in the end.

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“…where ∆ϕ is the phase difference between the cross-and copolarized components. In addition, the polarization rotation angle θ and the ellipticity η [2] can be expressed respectively by…”

Section: Design and Theoretical Analysismentioning

confidence: 99%

“…Terahertz (THz) waves lie between microwave and infrared waves in the electromagnetic spectrum, and they have many unique properties, [1] including high signal-noise ratio, ultra-wideband, and strong transmission capability. [2] Natural materials have a relatively weak electromagnetic response in the terahertz band. Therefore, traditional terahertz modulators are not only inefficient, but also very thick, which is not conducive to the development of modern optical systems.…”

Section: Introductionmentioning

confidence: 99%

Dynamically controlled asymmetric transmission of linearly polarized waves in VO₂-integrated Dirac semimetal metamaterials

Xu¹,

Yin²,

Huang³

et al. 2022

Chinese Phys. B

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We numerically demonstrated a novel chiral metamaterial to achieve broadband asymmetric transmission (AT) of linearly polarized electromagnetic waves in terahertz (THz) band. The proposed metamaterial unit cell exhibits no rotational symmetry with vanadium dioxide (VO2) inclusion embedded between Dirac semimetals (DSMs) pattern. The resonant frequency of AT can be dynamically tunable by varying the Fermi energy (E F) of the DSMs. The insulator-to-metal phase transition of VO2 enables the amplitude of the AT to be dynamically tailored. The transmission coefficient |T yx | can be adjusted from 0.756 to nearly 0 by modifying the conductivity of VO2. Meanwhile, the AT parameter intensity of linearly polarized incidence can be actively controlled from 0.55 to almost 0, leading to a switch for AT. When VO2 is in its insulator state, the proposed device achieves broadband AT parameter greater than 0.5 from 1.21 THz to 1.80 THz with a bandwidth of 0.59 THz. When the incident wave propagates along the backward (-z) direction, the cross-polarized transmission |T yx | reaches a peak value 0.756 at 1.32 THz, whereas the value of |T xy | well below 0.157 in the concerned frequency. On the other hand, the co-polarized transmission |T xx | and |T yy | remained equal in the whole frequency range. This work provides a novel approach in developing broadband, tunable, as well as switchable AT electromagnetic devices.

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Dual-function tuneable asymmetric transmission and polarization converter in terahertz region

Cited by 40 publications

References 40 publications

Realization of multifunctional transformation based on the vanadium dioxide-assisted metamaterial structure

Realization of multifunctional transformation based on the vanadium dioxide-assisted metamaterial structure

A Review: The Functional Materials-Assisted Terahertz Metamaterial Absorbers and Polarization Converters

Dynamically controlled asymmetric transmission of linearly polarized waves in VO₂-integrated Dirac semimetal metamaterials

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Dual-function tuneable asymmetric transmission and polarization converter in terahertz region

Cited by 40 publications

References 40 publications

Realization of multifunctional transformation based on the vanadium dioxide-assisted metamaterial structure

Realization of multifunctional transformation based on the vanadium dioxide-assisted metamaterial structure

A Review: The Functional Materials-Assisted Terahertz Metamaterial Absorbers and Polarization Converters

Dynamically controlled asymmetric transmission of linearly polarized waves in VO2-integrated Dirac semimetal metamaterials

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Dynamically controlled asymmetric transmission of linearly polarized waves in VO₂-integrated Dirac semimetal metamaterials