Modulating Sub-THz Radiation with Current in Superconducting Metamaterial

Savinov, Vassili; Fedotov, V.A.; Anlage, Steven M.; Groot, P.A.J. de; Zheludev, Nikolay I.

doi:10.1103/physrevlett.109.243904

Cited by 94 publications

(72 citation statements)

References 49 publications

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“…At that point, only a handful of groups were working on superconducting metamaterials and we benefited from discussion and collaborations with Professor Steven Anlage at the University of Maryland, who came to visit us on a few occasions. Our further work included the demonstration of a frequency-selective, energyharvesting, sub-THz superconducting bolometer using 'coherent metamaterials' [46], and a sub-THz electro-optical modulator based on a niobium superconducting metamaterial, where current passing through a network of superconducting metamolecules controls the state of superconductivity [47]. We also explored the idea of flux-exclusion quantum metamaterials [48].…”

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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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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“…Superconductors, on the other hand, are intrinsically nonlinear materials, due to the extreme sensitivity of the superconducting state in external stimuli [7,8], which moreover exhibit significantly reduced Ohmic losses. They thus provide unique opportunities to the researchers in the field for the fabrication of superconducting metamaterials with highly controllable effective electromagnetic properties including wideband tuneability [9,10,11,12,13,14,15,16,17,18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Wide-band tuneability, nonlinear transmission, and dynamic multistability in SQUID metamaterials

2014

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Superconducting metamaterials comprising rf SQUIDs (Superconducting QUantum Interference Devices) have been recently realized and investigated with respect to their tuneability, permeability and dynamic multistability properties. These properties are a consequence of intrinsic nonlinearities due to the sensitivity of the superconducting state to external stimuli. SQUIDs, made of a superconducting ring interrupted by a Josephson junction, possess yet another source of nonlinearity, which makes them widely tuneable with an applied dc dlux. A model SQUID metamaterial, based on electric equivalent circuits, is used in the weak coupling approximation to demonstrate the dc flux tuneability, dynamic multistability, and nonlinear transmission in SQUID metamaterials comprising non-hysteretic SQUIDs. The model equations reproduce the experimentally observed tuneability patterns, and predict tuneability with the power of an applied ac magnetic magnetic field. Moreover, the results indicate the opening of nonlinear frequency bands for energy transmission through SQUID metamaterials, for sufficiently strong ac fields.

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“…This metamaterial has been extensively studied in microwave, 30 terahertz, [31][32][33][34][35] and optical ranges. 36 The size of the unit-cell is dictated by the substrate permittivity and the target resonant frequency, the asymmetry of the splits in the rings controls the quality factor of metamaterial response.…”

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confidence: 99%

“…The geometry of the unit cell in this paper is based on our previous work. 33,34 In the meta-molecules, the width of the superconducting arcs was 30 lm. It narrowed down to just 3 lm at the mid-points of the arcs.…”

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confidence: 99%