Terahertz Modulator Based on Vertically Coupled Fano Metamaterial

Tran, Tuan Anh Pham; Bolívar, P. Haring

doi:10.1109/tthz.2018.2851919

Cited by 16 publications

(2 citation statements)

References 36 publications

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“…Metamaterials, as special electromagnetic response materials, are composed of sub-wavelength microstructures produced by artificial designs [7,8]. Using the combination of metamaterials and THz technology, researchers have designed a variety of high-efficiency optical devices such as filters [9,10], modulators [11], switchers [12], and absorbers [13,14]. Among them, THz absorbers based on metamaterials have shown promising applications in the fields of invisibility cloaks, wireless communications, and thermal emitters [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Switchable Terahertz Absorber from Single Broadband to Dual Broadband Based on Graphene and Vanadium Dioxide

Wang

Jia

et al. 2022

Nanomaterials

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A multifunctional switchable terahertz (THz) absorber based on graphene and vanadium dioxide (VO2) is presented. The properties of the absorber are studied theoretically by the finite-difference time-domain (FDTD) method. The results illustrate that the structure switches between the single-broadband or double-broadband absorption depending on the temperature of VO2. Moreover, the amplitude of the absorptivity can be adjusted by changing the Fermi energy level (EF) of graphene or the conductivity of VO2 separately. Via impedance matching theory, the physical mechanism of the absorber is researched. Furthermore, the effects of incidence angle on absorption have also been studied. It is found that the absorber is insensitive to the polarization of electromagnetic waves.

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Section: Introductionmentioning

confidence: 99%

Switchable Terahertz Absorber from Single Broadband to Dual Broadband Based on Graphene and Vanadium Dioxide

Wang

Jia

et al. 2022

Nanomaterials

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“…In refs. [19]- [21] we have proposed a three-dimensional THz LC architecture sustaining a circuit-like mode where the electric field is strongly confined inside the capacitive parts of the device that are filled with a semiconductor layer, and a similar design was proposed for THz modulators [22]. A key property targeted in such double-metal designs is their capacity to confine the electric field of the resonant mode into well-defined regions of space that correspond exactly to their capacitive parts.…”

Section: Introductionmentioning

confidence: 99%

Quasi-static and propagating modes in three-dimensional THz circuits

Jeannin¹,

Gacemi²,

Vasanelli³

et al. 2020

Opt. Express

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We provide an analysis of the electromagnetic modes of three-dimensional metamaterial resonators in the THz frequency range. The fundamental resonance of the structures is fully described by an analytical circuit model, which not only reproduces the resonant frequencies but also the coupling of the metamaterial with an incident THz radiation. We also evidence the contribution of the propagation effects, and show how they can be reduced by design. In the optimized design the electric field energy is lumped into ultra-subwavelength (λ/100) capacitors, where we insert semiconductor absorber based on the collective electronic excitation in a two dimensional electron gas. The optimized electric field confinement is evidenced by the observation of the ultra-strong light-matter coupling regime, and opens many possible applications for these structures for detectors, modulators and sources of THz radiation.

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Convert from Fano resonance to electromagnetically induced transparency effect using anti-symmetric H-typed metamaterial resonator

Wang

Lou

et al. 2020

Opt Quant Electron

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Terahertz Modulator Based on Vertically Coupled Fano Metamaterial

Cited by 16 publications

References 36 publications

Switchable Terahertz Absorber from Single Broadband to Dual Broadband Based on Graphene and Vanadium Dioxide

Switchable Terahertz Absorber from Single Broadband to Dual Broadband Based on Graphene and Vanadium Dioxide

Quasi-static and propagating modes in three-dimensional THz circuits

Convert from Fano resonance to electromagnetically induced transparency effect using anti-symmetric H-typed metamaterial resonator

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