Sensitive Detection of Doped Polymer Thin Films Using Terahertz Metamaterial Based on Analog of Electromagnetically Induced Transparency

Hu, Yanqi; Zhou, Xingyu; Sun, Qitai; Zeng, Guang; Xiong, Yongqian

doi:10.1109/jsen.2023.3234970

Cited by 13 publications

(3 citation statements)

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“…Reference [25] uses the etching technique combined with Fano resonance in a THz metasurface to suppress more losses and increasing the performance in liquid sensing application in which measured maximum 0.5 in transmission peak magnitude with wider line width for the bare structure. Another THz EIT-like metasurface introduced by [26] for polymer sensing reported transmission peak magnitude of less than 0.6 with wider line width.…”

Section: Resultsmentioning

confidence: 99%

An ultrathin and flexible terahertz electromagnetically induced transparency-like metasurface based on asymmetric resonators

et al. 2023

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Terahertz (THz) electromagnetically induced transparency-like (EIT-like) metasurfaces have been extensively explored and frequently used for sensing, switching, slow light, and enhanced nonlinear effects. Reducing radiation and non-radiation losses in EIT-like systems contributes to increased electromagnetic (EM) field confinement, higher transmission peak magnitude, and Q-factor. This can be accomplished by the use of proper dielectric properties and engineering novel designs. Therefore, we fabricated a THz EIT-like metasurface based on asymmetric metallic resonators on an ultra-thin and flexible dielectric substrate. Because the quadruple mode is stimulated in a closed loop, an anti-parallel surface current forms, producing a transparency window with a transmission peak magnitude of 0.8 at 1.96 THz. To control the growing trend of EIT-like resonance, the structure was designed with four asymmetry levels. The effect of the substrate on the resonance response was also explored, and we demonstrated experimentally how the ultra-thin substrate and the metasurface asymmetric novel pattern contributed to higher transmission and lower loss.

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Section: Resultsmentioning

confidence: 99%

An ultrathin and flexible terahertz electromagnetically induced transparency-like metasurface based on asymmetric resonators

et al. 2023

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“…As an artificially manufactured periodic subwavelength structure, metastructure possesses many excellent properties that cannot be replaced by traditional materials, and can also show analogous quantum optical effects or interesting features, such as electromagnetic-induced transparency (EIT), [1,2] narrowband absorption (NA), [3,4] metalens, [5] and frequency selective surfaces. [6] Therefore, metastructure has gradually demonstrated unique advantages in functional integration and multifunctional control fields.…”

Section: Introductionmentioning

confidence: 99%

Janus Device Based on Liquid Crystal Regulation with a Large Incidence Angle: Analogous Quantum Optical Effect and Absorption

Liao,

Sui,

Chen

et al. 2023

Annalen der Physik

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In this paper, a Janus metastructure device (JMD) is proposed. The JMD design introduces asymmetric structures, which leads to the generation of analogous quantum optical effects when light is incident at large angles. Specifically, forward electromagnetic‐induced transparency (EIT) and backward narrowband absorption (NA) are achieved when light is incident along different directions, displaying Janus characteristics in the forward and backward directions. Additionally, the operating frequency of JMD can be controlled through the use of liquid crystal. Such features hold promising potential for various applications in photonic and optoelectronic fields. When the axial direction of the liquid crystal is oriented along the x‐direction, the JMD achieves a transparent window over 90% within 0.46–0.51 THz at forward incidence, and an absorption peak of 84.1% appears at 0.331 THz at backward incidence. When the axial direction is oriented along the y‐direction, the JMD achieves EIT in the range of 0.51–0.575 THz at forward incidence, and a backward absorption peak of 93.3% occurs at 0.305 THz. In addition, the performance changes at different polarization and incidence angles are presented. The mechanism of absorption generation, the method of suppressing excess absorption, and the parametric inversion of the electromagnetic characteristics of JMD are also discussed.

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“…In particular, easy regulation of its conductivity by regulating external voltage, thereby tuning its Fermi energy [11][12][13][14]. In addition, it has been recently reported that the EIT metamaterials are dynamically modulated as a tunable bright or dark resonator by using graphene [15,16]. In this case, the resonance frequency of graphene will change during the modulation process, the frequency of the transparency window and the adjacent spectrum.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetically induced transparency based on metal-graphene hybrid metamaterials

Wang,

Tong,

Xiao

et al. 2023

Opt Quant Electron

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This paper introduces a novel metal-graphene composite metamaterial modulator that can produce a tunable EIT (Electromagnetically induced transparency) effect with good modulation effect under the action of an applied voltage. The material structure consists of bright mode coupling between a metal strip and a metal U-shaped ring. We investigated the nature of the field and indicated that the detuning of the dipole of the metallic ribbon structure and the quadrupole structure of the metallic U-ring induces an EIT-like reaction. The coupling effect of the metal resonant cavity was analyzed, this is, the coupling between the metal layer and the mono-graphene on the transparency window. By varying the voltage between the substrate silicon and the monolayer graphene surface in the structure, the modulator can achieve a maximum modulation depth of 83.4% and on the transparent window, the light will have a positive group delay of 8 ps, This wok can be applied to future 6G wireless communications et al.

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Sensitive Detection of Doped Polymer Thin Films Using Terahertz Metamaterial Based on Analog of Electromagnetically Induced Transparency

Cited by 13 publications

References 50 publications

An ultrathin and flexible terahertz electromagnetically induced transparency-like metasurface based on asymmetric resonators

An ultrathin and flexible terahertz electromagnetically induced transparency-like metasurface based on asymmetric resonators

Janus Device Based on Liquid Crystal Regulation with a Large Incidence Angle: Analogous Quantum Optical Effect and Absorption

Electromagnetically induced transparency based on metal-graphene hybrid metamaterials

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