Far-field Metamaterial Superlens

Yuan, Guanghui; Rogers, Katrine S.; Rogers, Edward T. F.; Zheludev, Nikolay I.

doi:10.1364/cleo_qels.2018.fm3j.2

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Recently, a radically new type of metamaterial 'super-lens', a planar array of discrete sub-wavelength metamolecules with individual scattering characteristics that have been engineered to vary spatially was demonstrated, which allows the creation of superoscillatory foci of arbitrary shape and size [50]. The new principle of the far-field metamaterial 'super-lens' is demonstrated by fabricating and characterizing free-space lenses with previously unattainable effective numerical apertures as high as 1.52 and foci as small as 0.33λ in size.…”

Section: Optical Superoscillatory Focusing and Imaging Technologiesmentioning

confidence: 99%

Roadmap on superoscillations

Berry

Zheludev

Aharonov

et al. 2019

J. Opt.

154

105

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Superoscillations are band-limited functions with the counterintuitive property that they can vary arbitrarily faster than their fastest Fourier component, over arbitrarily long intervals. Modern studies originated in quantum theory, but there were anticipations in radar and optics. The mathematical understanding—still being explored—recognises that functions are extremely small where they superoscillate; this has implications for information theory. Applications to optical vortices, sub-wavelength microscopy and related areas of nanoscience are now moving from the theoretical and the demonstrative to the practical. This Roadmap surveys all these areas, providing background, current research, and anticipating future developments.

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Section: Optical Superoscillatory Focusing and Imaging Technologiesmentioning

confidence: 99%

Roadmap on superoscillations

Berry

Zheludev

Aharonov

et al. 2019

J. Opt.

154

105

View full text Add to dashboard Cite

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Metalenses for subwavelength imaging

Baryshnikova¹,

Kharintsev²,

Belov³

et al. 2022

Phys.-Usp.

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Devices that form an optical image with a subwavelength resolution in real time—metalenses—are considered. Such devices either operate with near optical fields or convert near fields into wave fields. As a result, the spatial resolution of these devices is not limited by the diffraction limit. At the same time, the image is formed at a considerable distance from the object, which distinguishes near-field metalenses from the instruments used in near-field probe microscopy. Metalenses are implemented based on metamaterials or their two-dimensional analogs, metasurfaces. Historically, this line of research was based on the so-called perfect lens, the concept of which did not withstand experimental verification but gave impetus to the development of real metalenses. Depending on the device and principle of operation, metalenses are called either superlenses or hyperlenses.

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Far-field Metamaterial Superlens

Cited by 2 publications

References 4 publications

Roadmap on superoscillations

Roadmap on superoscillations

Metalenses for subwavelength imaging

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