Sub-wavelength annular-slit-assisted superoscillatory lens for longitudinally-polarized super-resolution focusing

Kim, Hyuntai; Rogers, Edward T. F.

doi:10.1038/s41598-019-56810-3

Cited by 12 publications

(4 citation statements)

References 33 publications

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“…The metallic nano-slit structure exhibits properties similar to dielectric when the polarization and slit directions are perpendicular [15,17]. That is, even if a metal-relatively easy to process-is used, a binary lens with an efficiency comparable to that of a dielectric zone plate can be manufactured.…”

Section: Methodsmentioning

confidence: 99%

Numerical Study on Enhanced Line Focusing via Buried Metallic Nanowire Assisted Binary Plate

Kim

2021

Nanomaterials

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Line focusing, which collects light into a line rather than a single point, has an advantage on variable fields such as machining and imaging. The 1-dimensional metallic zone plate is one of the candidates for line focusing, which is ultra-thin and simple to fabricate. Metallic nano-slits can replace the metal blocked region to increase the efficiency, however, the efficiency and stability are still low. Therefore, this paper proposes a structure with an additional dielectric layer to protect the metallic nano-slit layer—a buried metallic wire structure—and verify the idea based on numerical simulations. Two structures are proposed. In terms of stability, a flat surface structure is proposed and a corrugated surface structure with a consistent thickness with the nano-slit is proposed which has low fabrication difficulty. The optimization of the buried wire structure and performance after applying the buried wire structure to the dual-line focusing plate is calculated by numerical simulation. Finally, it was shown that the electric field intensity was 2.13 times greater.

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Section: Methodsmentioning

confidence: 99%

Numerical Study on Enhanced Line Focusing via Buried Metallic Nanowire Assisted Binary Plate

Kim

2021

Nanomaterials

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“…Concurrently, advancements in fabrication and measurement technologies have enabled the production of materials on the nanoscale, allowing for the observation of phenomena at this minuscule level [ 2 , 13 , 14 ]. In optics, the advent of nanophotonics has given rise to developments in thin optics, plasmonics, and metamaterials [ 15 , 16 , 17 , 18 , 19 , 20 ]. Fabricating structures smaller than the wavelength of light results in the medium appearing as a homogeneous substance from the perspective of light, affording engineers with the ability to manipulate its properties.…”

Section: Introductionmentioning

confidence: 99%

A Waveguide Inline Binary Metasurface for Wavelength-Selective Transmission and Standing Wave Focusing

Cho,

Kim

2024

Nanomaterials

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This study presents an innovative inline metasurface design for selective wavelength transmission and focusing. When integrated into optical fibers, it improves the stability and compatibility with techniques like wavelength division multiplexing and phase modulation. Precise parameters, determined through analytical calculations and simulations, allow for the design of multifunctional lenses within the optical fiber platform. The numerical results demonstrate unmodulated transmission for specific wavelengths, while others exhibit standing wave focusing with a 0.67 μm beam radius and a 0.31 μm depth of focus. This technology holds promise for applications in quantum experiments, sensing, and optical communication.

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“…The main drawback is the microscopy of large samples. Super-oscillatory lenses 23 , 24 can also be used for sub-diffraction imaging. Although this is a high-resolution method, the object must be scanned and this can be time consuming especially for imaging large samples.…”

Section: Introductionmentioning

confidence: 99%

Far field superlensing inside biological media through a nanorod lens using spatiotemporal information

Hajiahmadi

Faraji‐Dana

Skrivervik

2021

Sci Rep

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Far field superlensing of light has generated great attention in optical focusing and imaging applications. The capability of metamaterials to convert evanescent waves to propagative waves has led to numerous proposals in this regard. The common drawback of these approaches is their poor performance inside strongly scattering media like biological samples. Here, we use a metamaterial structure made out of aluminum nanorods in conjunction with time-reversal technique to exploit all temporal and spatial degrees of freedom for superlensing. Using broadband optics, we numerically show that this structure can perform focusing inside biological tissues with a resolution of λ/10. Moreover, for the imaging scheme we propose the entropy criterion for the image reconstruction step to reduce the number of required optical transducers. We propose an imaging scenario to reconstruct the spreading pattern of a diffusive material inside a tissue. In this way super-resolution images are obtained.

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Sub-wavelength annular-slit-assisted superoscillatory lens for longitudinally-polarized super-resolution focusing

Cited by 12 publications

References 33 publications

Numerical Study on Enhanced Line Focusing via Buried Metallic Nanowire Assisted Binary Plate

Numerical Study on Enhanced Line Focusing via Buried Metallic Nanowire Assisted Binary Plate

A Waveguide Inline Binary Metasurface for Wavelength-Selective Transmission and Standing Wave Focusing

Far field superlensing inside biological media through a nanorod lens using spatiotemporal information

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