Lattice modes have been proposed as a means to engineer and control the linewidth spectral position of optical resonances in arrays metallic nanoparticles sustaining localized surface plasmon (LSP) resonances.Lattice are produced by interference LSP-enhanced in-plane scattered light, leading Fano-like lineshape with reduced linewidth.In this paper, we study lattice supported gold aluminium nanoparticle visible UV, both experimentally theoretically.The measured simulated dispersion curves...

Plasmonics, the science and technology of interaction light with metallic objects, is fundamentally changing way we can detect, generate manipulate light. Although field progressing swiftly, thanks to availability nanoscale manufacturing analysis methods, fundamental properties such as plasmonic excitations' symmetries cannot be accessed directly, leading a partial, sometimes incorrect, understanding their properties. Here overcome this limitation by deliberately shaping wave function an...

Metallic nanostructures are the building blocks for nanoplasmonics and subsequent applications in nanooptics. For several decades, plasmonics have been almost exclusively studied visible region by using made of noble metals exhibiting plasmonic properties near infrared to range. This notwithstanding, emerging will require extension toward higher energies, particularly UV Therefore, alternative metals, often described as poor achieve that goal. Among all these aluminium appears be one most...

We report on the high resolution imaging of multipolar plasmonic resonances in aluminum nanoantennas using electron energy loss spectroscopy (EELS). Plasmonic ranging from near-infrared to ultraviolet (UV) are measured. The spatial distributions resonant modes mapped and their dispersion is retrieved. losses antennas studied through full width at half-maximum resonances, unveiling weight both interband radiative damping mechanisms different resonances. In blue-UV spectral range, order...

We report on a straightforward preparation method to obtain dense layer of quasi-spherical aluminum nanoparticles over large area. The is based rapid thermal annealing thin film deposited super-repellent substrate. Diameters ranging from 2 15 nm are obtained by varying the thickness. Aluminum exhibit well-defined localized surface plasmon resonances in ultraviolet range as revealed extinction measurements and confirmed Mie theory.

We use electron energy loss spectroscopy (EELS) to perform a comprehensive and mapping of the plasmonic modes sustained by aluminum nanotriangles. Behind apparent simplicity such structures, rich variety is observed. Edge pseudoradial breathing (pseudo-RBMs) are unveiled as they couple efficiently with source. propose analytical models confirmed rigorous simulations index both families describe their spatial symmetry. could be indexed nanoantenna modes, while pseudo-RBMs match triangular...

Plasmonic nanostructures and -devices are rapidly transforming light manipulation technology by allowing to modify enhance optical fields on sub-wavelength scales. Advances in this field rely heavily the development of new characterization methods for fundamental nanoscale interactions. However, direct quantitative mapping transient electric magnetic characterizing plasmonic coupling has been proven elusive date. Here we demonstrate how directly measure inelastic momentum transfer surface...

Aluminum is now regarded as one of the best metals for pushing plasmonics towards ultraviolet.When exposed to air, a 3-5 nm alumina shell formed rapidly around aluminum, preventing further oxygen penetration.This natural oxidation layer known chemically stabilize Al.Nevertheless, due large surface volume ratio Al nanoparticles, their long-term stability an issue, especially when they are polycrystalline.This critical point has be developed optical properties conventionally evaporated...

Aluminum is now widely regarded as a promising plasmonic material, especially in the ultraviolet spectrum. We propose rapid thermal annealing (RTA) simple method to significantly decrease amount of intrinsic losses aluminum nanoparticles. study structural and optical properties nanoparticles before after RTA at different temperatures. Our results unveil how affects Al through competition between reduction number grain boundaries oxidation. If performed below threshold temperature 400 °C,...

To mimic the optical influence of disorder in condensed matter, effect uniform on plasmonic resonances were investigated numerically and experimentally aluminum (Al) nanoparticle arrays. Resorting to analogue a periodic array crystal sharp spectrum its anisotropy, transition from glass (with broadened isotropy) is imitated by three kinds Al metasurfaces: varying displacement, size rotation each array. The random variation location or nanodisk induces broadening reduction their without...

We show both numerically and experimentally that intense, narrow, low-divergence beams of light are produced at the apex dielectric pyramid-shaped microtips. These exhibit a Bessel transverse profile but narrower than usual beam, allowing for significant enhancement intensity inside beam. They generated by axicon-like structures with submicrometric height imprinted in glass combining optical lithography chemical etching. The resulting imaged using fluorescence microscopy, remarkable...

Significance Optical antennas perform the same functions for light that aerials do radio waves; they can extract energy from a propagating electromagnetic field, and convert localized into radiation. Here, we use fractal-like design, Cayley tree, to create optical antennas. Implementing this simple iterative design with aluminum as antenna material, demonstrate broadband operating range energies corresponding thermal radiation up ultraviolet. The spatial distribution of inside is...

Numerous applications of nanotechnologies rely on the wide availability high-quality crystalline nanoparticles (NPs). Although chemical synthesis noble metal (gold and silver) is well mastered, pushing optical response metallic towards ultraviolet requires other materials, such as aluminum. a few demonstrations Al have been reported so far, an elaboration path allowing for range NP size that compatible with mass production has yet to be demonstrated. In this article, we report spherical,...

We report on the synthesis of Ni nanoparticles via thin film thermal annealing.The as prepared particles exhibit a tunable average diameter ranging from 13 nm to 44 depending initial deposited thickness and are covered with stable NiO x shell.This technique is suitable for large scale fabrication onto substrates.The study magnetic optical properties these nanostructures revealed ferromagnetic behaviour at room temperature localized surface plasmon resonance in UV-range, promoting material...

Aluminum nanostructures have recently been at the focus of numerous studies due to their properties including oxidation stability and surface plasmon resonances covering ultraviolet visible spectral windows. In this article, we reveal a facet metal relevant for both plasmonic purposes photothermal conversion. The field distribution high-order existing in two-dimensional Al structures is studied by nonlinear photoluminescence microscopy region where electronic interband transitions occur....

Plasmonic color using metallic nanostructures has attracted considerable interest because of its subwavelength resolution and long sustainability. Significant efforts have been devoted to expanding the gamut plasmonic generation by tuning composition, shape, components in primary pixel. In this study, we develop a novel straightforward strategy for aluminum printing aimed at practical commercial applications. An array nanodisks is designed broadband scattering white pixels instead three...

The top surface roughness of Al nanodisk has significant influences on the substrate-induced out-of-plane quadrupolar mode Q and in-plane dipolar D.

Thanks to their small sensing volume, nanosensors based on localized surface plasmon resonances (LSPR) allow the detection of minute amounts analytes, down single-molecule limit. However, detected analytes are often large molecules, such as proteins. The molecules remains largely unexplored. Here, we use a hybrid photonic-plasmonic nanosensor detect target molecule (pyridine). sensor's design is dielectric photonic microstructure acting an antenna, which efficiently funnels light toward...

An electromagnetic field is able to produce a collective oscillation of free electrons at metal surface. This allows light be concentrated in volumes smaller than its wavelength. The resulting waves, called surface plasmons can applied various technological applications such as ultra-sensitive sensing, Surface Enhanced Raman Spectroscopy, or metal-enhanced fluorescence, name few. For several decades plasmonics has been almost exclusively studied the visible region by using nanoparticles made...

A single metallic nanodisk is the simplest plasmonic nanostructure, but it robust enough to generate a Fano resonance in forward and backward scattering spectra by increment of height symmetric asymmetric dielectric environment. Thanks phase retardation effect, non-uniform distribution electric field along aluminum (Al) generates out-of-plane higher-order modes, which interfere with dipolar mode subsequently result Fano-lineshape spectra. Meanwhile, symmetry-breaking effect substrate...