Tuning the Optical Properties of Hyperbolic Metamaterials by Controlling the Volume Fraction of Metallic Nanorods

Leontiev, A. P.; Volkova, Olga; Kolmychek, I. A.; Venets, Anastasia V.; Pomozov, A. R.; Stolyarov, V. S.; Murzina, T. V.; Napolskii, K. S.

doi:10.3390/nano9050739

Cited by 12 publications

(6 citation statements)

References 35 publications

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“…Thus, a decrease in the density of active electrodes could be more appropriate because of the decrease in electric double layer charging current and, as a consequence, the growth of the signal-to-noise ratio. A controlled decrease in the active nanoelectrodes in the array can be achieved by modification of the AAO structure and artificial pore branching [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

Uniform arrays of gold nanoelectrodes with tuneable recess depth

Gordeeva¹,

Roslyakov²,

Leontiev³

et al. 2021

Beilstein J. Nanotechnol.

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Nanoelectrode arrays are much in demand in electroanalytical chemistry, electrocatalysis, and bioelectrochemistry. One of the promising approaches for the preparation of such systems is templated electrodeposition. In the present study, porous anodic alumina templates are used to prepare Au nanoelectrode arrays. Multistage electrodeposition is proposed for the formation of recessed electrodes with the ability to tune the distance between the surface of the porous template and the top surface of the nanoelectrodes. A set of complementary techniques, including chronoamperometry, coulometry, and scanning electron microscopy, are used to characterize the nanoelectrode arrays. The number of active nanoelectrodes is experimentally measured. The pathways to further improve the recessed nanoelectrode arrays based on anodic alumina templates are discussed.

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Section: Resultsmentioning

confidence: 99%

Uniform arrays of gold nanoelectrodes with tuneable recess depth

Gordeeva¹,

Roslyakov²,

Leontiev³

et al. 2021

Beilstein J. Nanotechnol.

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“…Simulations of the permittivity components within the effective medium model show that the spectral positions of these resonances coincide with the pole of the effective  and zero of   components, respectively [21]. Variation of the metal volume fraction and the length of nanorods allows us to tune the spectral position of the ENZ point [22]. Moreover, strong HMM dispersion in the vicinity of the ENZ and ENP points leads to giant optical birefringence unattainable in natural media, whereas it is rather promising for applications in polarization converters [16,23].…”

Section: Introductionmentioning

confidence: 93%

Magneto-optical effects in hyperbolic metamaterials based on ordered arrays of bisegmented gold/nickel nanorods

Malysheva¹,

Kolmychek²,

Romashkina³

et al. 2021

Nanotechnology

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Hyperbolic metamaterials (HMM) based on multilayered metal/dielectric films or ordered arrays of metal nanorods in a dielectric matrix are extremely attractive optical materials for manipulating over the parameters of the light flow. One of the most promising tools for tuning the optical properties of metamaterials in situ is the application of an external magnetic field. However, for the case of HMM based on the ordered arrays of magneto-plasmonic nanostructures, this effect has not been clearly demonstrated until now. In this paper, we present the results of synthesis of HMM based on the highly-ordered arrays of bisegmented Au/Ni nanorods in porous anodic alumina templates and a detailed study of their optical and magneto-optical properties. Distinct enhancement of the magneto-optical (MO) effects along with their sign reversal is observed in the spectral vicinity of epsilon-near-zero and epsilon-near-pole spectral regions. The underlying mechanism is the amplification of the MO polarization plane rotation initiated by Ni segments followed by the light propagation in a strongly birefringent HMM. This stays in agreement with the phenomenological description and relevant numerical calculations.

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“…Today, porous AAO films find numerous applications as membranes, 2−4 porous supports, 5,6 templates, 7−10 sensors, 11−13 photonic crystals, 14,15 and metamaterials. 16,17 It has been found that increasing the degree of pore ordering improves the functional properties of AAO substantially. 18−21 AAO with highly ordered structure forms if anodizing is performed under kinetic or diffusion control of the electrode reaction.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Since the discovery of anodic aluminum oxide (AAO) with an ordered honeycomb-like structure, aluminum anodizing in acidic electrolytes is widely used in nanotechnology. Today, porous AAO films find numerous applications as membranes, − porous supports, , templates, − sensors, − photonic crystals, , and metamaterials. , It has been found that increasing the degree of pore ordering improves the functional properties of AAO substantially. − AAO with highly ordered structure forms if anodizing is performed under kinetic or diffusion control of the electrode reaction. , …”

Section: Introductionmentioning

confidence: 99%

Evolution of Pore Ordering during Anodizing of Aluminum Single Crystals:In SituSmall-Angle X-ray Scattering Study

et al. 2021

Self Cite

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Self-organization of pores in anodic aluminum oxide (AAO) is a unique phenomenon attracting significant interest from both fundamental and practical points of view. Although the influence of crystallographic orientation of Al substrate on the degree of pore ordering has been clearly demonstrated, the information about the kinetics of selforganization in AAO formed on various low-index facets of Al is absent. Here, the kinetics of pore ordering during anodizing of lowindex surfaces of Al single crystals is studied by using the in situ small-angle X-ray scattering technique. The fastest decrease in the dispersion of pore growth direction is found in the case of anodizing of the Al(100) substrate. To obtain the comparable outof-plane pore ordering in the case of Al( 111) anodizing, the charge density should be doubled. On the contrary, on the Al(111) the fastest kinetics of in-plane orientational pore ordering is observed. The average domain size in the AAO films grown on Al(100) and Al( 110) is limited by about 20 lattice periods, whereas the unlimited growth of the domains is observed in the case of the Al(111) substrate. The pore organization into hexagonal domains is found to be much faster than the development of long-range in-plane orientational pore order.

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Tuning the Optical Properties of Hyperbolic Metamaterials by Controlling the Volume Fraction of Metallic Nanorods

Cited by 12 publications

References 35 publications

Uniform arrays of gold nanoelectrodes with tuneable recess depth

Uniform arrays of gold nanoelectrodes with tuneable recess depth

Magneto-optical effects in hyperbolic metamaterials based on ordered arrays of bisegmented gold/nickel nanorods

Evolution of Pore Ordering during Anodizing of Aluminum Single Crystals:In SituSmall-Angle X-ray Scattering Study

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