Fabrication of Soft-Glass-Based Wire Array Metamaterial Fibers for Applications at Infrared Frequencies

Hayashi, Juliano G.; Lwin, Richard; Stefani, Alessio; Fleming, Simon; Kuhlmey, Boris T.; Argyros, Alexander

doi:10.1109/jlt.2019.2926808

Cited by 8 publications

(10 citation statements)

References 34 publications

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“…[42] More interestingly, solid metallic wires can be inserted in the holes or even liquid metal can be forced into them to add electrical functionalities to the fiber. [43,44] Figure 8a describes an all-glass hollow fiber manufactured by the stack-and-draw technique to which copper wires are added post-drawing to the fiber. Micrograph of the section of the initial fiber is shown on Figure 8b.…”

Section: Light-guiding Dual-electrode Fibers With Internal Rectangular Cavitymentioning

confidence: 99%

Stack‐and‐Draw Applied to the Engineering of Multi‐Material Fibers with Non‐Cylindrical Profiles

Strutynski

Meza

Teulé‐Gay

et al. 2021

Adv Funct Materials

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Here, it is demonstrated that the stack-and-draw approach can be expanded to unusual materials association and profile geometries to generate fiber assemblies with unprecedented functionalities. This approach relies on the stacking of flat oxide glass slides into a preform, which is then thermally elongated into tens-of-meters-long ribbon fibers with preserved cross-section ratio. Fabrication methodology is introduced. In order to illustrate the versatility of the method, a panel of fibers with diverse geometries and functions is exposed, including glass-only exposed-core fibers for chemical sensing and, upon the insertion of metal electrodes, H-shaped multi-cavity structures and compact, glass-metal fiber optical detectors applied to a gas analysis by means of fiber-tip plasma spectroscopy. It is believed this new approach will offer an attractive, straightforward solution for designing innovative, complex multimaterial fiber platforms with enhanced functionalities.

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Section: Light-guiding Dual-electrode Fibers With Internal Rectangular Cavitymentioning

confidence: 99%

Stack‐and‐Draw Applied to the Engineering of Multi‐Material Fibers with Non‐Cylindrical Profiles

Strutynski

Meza

Teulé‐Gay

et al. 2021

Adv Funct Materials

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“…3(d)). The details regarding its fabrication and the suppression of the Plateau-Rayleigh instabilities are fully described in [12,21]. An example of a typical steep tapering transition region fabricated from this standard metamaterial fibre using the stretching setup is seen in Fig.…”

Section: Hyperlens Fabricationmentioning

confidence: 99%

“…Wire array hyperlenses offer very broadband operation, high tunability, potentially lower losses due to the low metal fraction, and alternative low-cost/large-volume fabrication methods like fibre drawing [10][11][12]. Hyperbolic endoscopes that transport subdiffraction information away from its source have been demonstrated at microwave [13,14] and at THz frequencies [11], but far-field subdiffraction imaging has not been experimentaly explored yet, to the best of our knowledge.…”

mentioning

confidence: 99%

“…For microwave frequencies, these dimensions are in the mm scale, and wires can be manually assembled in air [13,14]. Alternative fabrication methods, such as the fibre drawing technique, can be employed to attain subwavelength wire array structures operational at shorter wavelengths [10][11][12]. In fibre drawing, a macroscopic array of metallic wires embedded in a dielectric (wire array preform) is scaled-down by several orders of magnitude, and the neckdown region generates a tapered magnifying hyperlens.…”

mentioning

confidence: 99%

“…The Plateau-Rayleigh instability [15], which is the tendency of a liquid column to break into droplets, limits the wire diameter and wire spacing to a few microns in the indium/polymer system [16,17], restricting the operation wavelength of the metamaterial to the far-infrared. Recently, we have demonstrated that such wire size limitation can be overcome by replacing the materials with tin and soda-lime glass and optimizing the drawing/stretching process [12]. Uniform wire array metamaterial fibres with wire diameter and spacing in the few hundreds of nm scale were obtained, resulting in wire array metamaterial that could operate at wavelengths as short as the mid-infrared.…”

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confidence: 99%

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Towards subdiffraction imaging with wire array metamaterial hyperlenses at MIR frequencies

Hayashi¹,

Stefani²,

Antipov³

et al. 2019

Opt. Express

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We describe the fabrication of metamaterial magnifying hyperlenses with subwavelength wire array structures for operation in the mid-infrared (around 3 µm). The metadevices are composed of approximately 500 tin wires embedded in soda-lime glass, where the metallic wires vary in diameter from 500 nm to 1.2 µm along the tapered structure. The modeling of the hyperlenses indicates that the expected overall losses for the high spatial frequency modes in such metadevices are between 20 dB to 45 dB, depending on the structural parameters selected, being promising candidates for far-field subdiffraction imaging in the mid-infrared. Initial far-field subdiffraction imaging attempts are described, and the problems encountered discussed. IntroductionA combination of conducting/dielectric layers or a subwavelength array of metallic wires embedded in a dielectric exhibit hyperbolic dispersion due to the high anisotropy of the medium [1]. In such hyperbolic metamaterial, high transverse spatial frequencies, which contain subdiffraction information and would be evanescent in conventional isotropic media, can propagate. A curved multilayer metamaterial and a tapered wire array medium, called hyperlenses, can also magnify the guided spatial frequencies, transforming the subdiffraction information into air-propagating waves, allowing subdiffraction imaging in the far-field [2-4].Far-field subdiffraction imaging with multilayer metal/dielectric metamaterial has been demonstrated at UV [3, 5] and visible [6] frequencies. This class of hyperlenses can be fabricated by the deposition of ultra-thin and smooth films, but exhibits high losses and high reflectivity due to its large metal fraction. High transmission can be obtained if the operational region is close to the metal's plasma frequency, where their reflectivity decreases, limiting their operation to narrow bands at UV/visible frequencies if noble metals are employed. Semiconductors can be combined with metal or highly doped semiconductor layers to shift the effective plasma frequency of the metamaterial to lower frequencies, leading to hyperlenses operating at near-infrared (NIR) [7] and at mid-infrared (MIR) [8] frequencies. Recent, theoretical investigations indicate that the losses of multilayer semiconductor material can be reduced by maximizing the mean scattering time of the doped layers and adjusting the layer thickness ratio [9], opening up new possibilities for far-field subdiffraction imaging in the MIR with semiconductor-based metamaterial. However, relatively narrow band, short wavelength operation and lack of a large volume fabrication method are still the main drawbacks of this class of hyperlens.

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Melt polymer drawn single and multi-capillary fibre-based electroosmotic pumps

Farajikhah

Beirne

et al. 2022

Microfluid Nanofluid

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Microfluidic devices have been employed in micro-analytical systems and microelectronics using inexpensive, customisable fluid-handling automation at the microliter scale. Here we utilise a well-established fibre drawing technique, which offers a range of materials and capillary conformations, that can be utilized within microfluidic devices to control fluid movement via electroosmotic processes to produce a simple electroosmotic pump (EOP). Single capillary EOPs were fabricated from drawn PU capillary fibres with internal diameters ranging from 73 to 200 µm and were shown to be capable of actively transporting a buffer solution using an external driving electric potential. A maximum flow rate of 0.8 ± 0.1 μL/min was achieved for a 73 ± 2 µm diameter PU capillary fibre at an applied potential of 750 V/cm. This flow rate was successfully increased up to 5.3 ± 0.3 μL/min by drawing a multi-capillary array consisting of 4, 5 and 7 capillaries.

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Fabrication of Soft-Glass-Based Wire Array Metamaterial Fibers for Applications at Infrared Frequencies

Cited by 8 publications

References 34 publications

Stack‐and‐Draw Applied to the Engineering of Multi‐Material Fibers with Non‐Cylindrical Profiles

Stack‐and‐Draw Applied to the Engineering of Multi‐Material Fibers with Non‐Cylindrical Profiles

Towards subdiffraction imaging with wire array metamaterial hyperlenses at MIR frequencies

Melt polymer drawn single and multi-capillary fibre-based electroosmotic pumps

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