Giant nonlinearity in a superconducting sub-terahertz metamaterial

Savinov, Vassili; Delfanazari, Kaveh; Fedotov, V.A.; Zheludev, Nikolay I.

doi:10.1063/1.4943649

Cited by 29 publications

(19 citation statements)

References 40 publications

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“…The superconducting metamaterials exhibited good tuning properties and a better slow light effect than the gold metamaterials. Recently, it has been demonstrated superconducting film under intense THz radiation could exhibit nonlinear behavior [15,16]. Thus, the superconducting metamaterials will contribute to the development of nonlinear THz devices with tuning ability.…”

Section: Resultsmentioning

confidence: 99%

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Tunable and high quality factor Fano and toroidal dipole resonances in terahertz superconducting metamaterials

Duan

Shen

et al. 2020

Mater. Res. Express

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We experimentally studied a series of terahertz (THz) metamaterials with asymmetric resonator structures made from superconducting niobium nitride or gold films. Fano and toroidal dipole resonances are excited in superconducting metamaterials and their quality factors are higher in comparison with those of gold samples. Superconducting samples possess good tuning behaviors for both Fano and toroidal dipole resonance frequencies due to the change of kinetic inductance under different temperatures. The superconducting samples also exhibit good slow light effect due to the sharp dispersion in transmission spectra. These tunable and low loss metamaterials possess great significance to the development of THz nonlinear and slow light devices.

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Section: Resultsmentioning

confidence: 99%

“…Reducing the loss of THz metamaterials will be of great benefit for elevating the performance of THz functional devices [13]. What is more, THz metamaterials with low loss can be used to strengthen the interaction of THz wave and materials and induce the nonlinear response of natural materials [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Tunable and high quality factor Fano and toroidal dipole resonances in terahertz superconducting metamaterials

Duan

Shen

et al. 2020

Mater. Res. Express

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“…Among the earlier reports utilizing classical [100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116][117][118][119] or high transition temperature (T c ) superconductors [120][121][122][123][124][125][126][127][128][129][130][131][132][133][134][135] for THz metamaterial design, we briefly review a few selected works employing three different types of superconductors, i.e., yttrium barium copper oxide (YBCO), Nb, and NbN, with their functionalities based on external variables and the nonlinear phenomena. While VO 2 has been utilized for both a film-type THz modulation medium and subwavelength structures to adjust the electromagnetic properties, superconductors have mainly been investigated to improve the performance of metallic structures as metamaterials.…”

Section: Superconductorsmentioning

confidence: 99%

“…Furthermore, the inherent change due to external stimuli, such as temperature, magnetic field, and electric bias, enables tuning of the electromagnetic properties of THz waves. Among the earlier reports utilizing classical [100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116][117][118][119] or high transition temperature (T c ) superconductors [120][121][122][123][124][125][126][127][128][129][130][131][132][133][134][135] for THz metamaterial design, we briefly review a few selected works employing three different types of superconductors, i.e., yttrium barium copper oxide (YBCO), Nb, and NbN, with their functionalities based on external variables and the nonlinear phenomena.…”

Section: Superconductorsmentioning

confidence: 99%

Dynamic Terahertz Plasmonics Enabled by Phase‐Change Materials

Jeong

Bahk

Kim

2019

Advanced Optical Materials

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Phase‐change phenomena have been an attractive research theme for decades due to the dynamic transition of material properties providing extraordinary capabilities for versatile optical device applications. Even at the terahertz (THz) frequency regime, phase‐change materials (PCMs) promote the development of dynamic devices, especially when combined with a plasmonic approach delivering strong field enhancement and localization. According to the design of plasmonic metamaterials or hybrid composites, PCMs can actively modulate the electromagnetic properties of THz waves through thermal, electrical, and optical means. In turn, THz waves can affect the PCM properties in the nonlinear regime due to the intense field strength enhancement by plasmonic structures. Here, a few types of PCMs demonstrating promising potential in THz plasmonic applications are introduced. Starting from the best‐known transition metal oxide, vanadium dioxide (VO2), which possesses an insulator‐to‐metal phase transition near room temperature, superconductors, chalcogenides, ferroelectrics, liquid crystals, and liquid metals are covered along with their phase‐change properties and the control mechanisms infused with THz plasmonic applications. The corresponding recent progress presenting how PCMs combined with plasmonic structures can demonstrate effective THz modulation is reviewed. This general overview may provide a better understanding of dynamic THz plasmonics and new ideas for future THz technology.

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“…However, perhaps the most relevant illustration of what it is possible to achieve with a highly sensitive state of superconductivity is our superconducting, sub-THz nonlinear metamaterial that operates in the CW regime. This device exhibited a record-breaking resonant, third-order nonlinearity with an effective n 2 = 10 cm 2 W −1 [49]. We designed this metamaterial in such a way that the heat of absorbed electromagnetic radiation was released in nanoscale constrictions of the superconducting metamolecules, suppressing superconductivity and higher powers.…”

Section: Developing Metamaterials Technology: Switching and Tunabilitymentioning

confidence: 99%

Metamaterials at the University of Southampton and beyond

Zheludev¹

2017

J. Opt.

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At the University of Southampton, research on metamaterials started in 2000 with a paper describing a metallic microstructure, comprising an ensemble of fully metallic 'molecules'. In the years since then, metamaterials have evolved from an approach for designing unusual electromagnetic properties by structuring matter at the sub-wavelength scale to become a universal paradigm for active functional media with optical properties on demand at any given point in time and space. Metamaterials are now recognized as a promising enabling technology and one of the most buoyant and exciting research disciplines at the crossroads between photonics and nanoscience. Many 'made in Southampton' concepts have influenced the global research community, and we are now working in collaboration with our sister research centre in Nanyang Technological University, Singapore. In this article, I provide a historical overview of the metamaterials research field, from early studies to recent developments through the lens of the Southampton group, and discuss promising future directions.

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Giant nonlinearity in a superconducting sub-terahertz metamaterial

Abstract: Subwavelength silicon through-hole arrays as an all-dielectric broadband terahertz gradient index metamaterial Appl. Phys. Lett. 105, 091101 (2014); 10.1063/1.4894054Tunable terahertz left-handed metamaterial based on multi-layer graphene-dielectric composite Appl. Phys. Lett.

Cited by 29 publications

References 40 publications

Tunable and high quality factor Fano and toroidal dipole resonances in terahertz superconducting metamaterials

Tunable and high quality factor Fano and toroidal dipole resonances in terahertz superconducting metamaterials

Dynamic Terahertz Plasmonics Enabled by Phase‐Change Materials

Metamaterials at the University of Southampton and beyond

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