The study of the resonant behavior silicon nanostructures provides a new route for achieving efficient control both electric and magnetic components light. We demonstrate experimentally numerically that enhancement localized fields can be achieved in nanodimer. For first time, we observe hotspots field at visible wavelengths light polarized across nanodimer's primary axis, using near-field scanning optical microscopy.

Abstract We reveal unusually strong polarization sensitivity of electric and magnetic dipole resonances high‐index dielectric nanoparticles placed on a metallic film. By employing dark‐field spectroscopy, we observe the polarization‐controlled transformation from high‐Q magnetic‐dipole scattering to broadband suppression associated with mode, show numerically that it is accompanied by enhancement respective fields nanoparticle. Our experimental data for silicon nanospheres are in an...

We study experimentally both magnetic and electric optically induced resonances of silicon nanoparticles by combining polarization-resolved dark-field spectroscopy near-field scanning optical microscopy measurements. reveal that the scattering spectra exhibit strong sensitivity dipole response to probing beam polarization attribute characteristic asymmetry measured patterns excitation a mode. The proposed experimental approach can serve as powerful tool for photonic nanostructures possessing...

All-dielectric nanoantennas proved to be an extremely versatile tool for efficient light manipulation at the nanoscale. Their rich functionality and excellent performance arise due low absorption high refractive index of all-dielectric materials, in particular, silicon, which enables observation pronounced magnetic electric Mie resonances subwavelength structures visible near-infrared ranges. Here, we demonstrate that spherical placed on a substrate supporting guided modes provide control...

Abstract Metasurfaces offer great potential to control near- and far-fields through engineering optical properties of elementary cells or meta-atoms. Such perspective opens a route efficient manipulation the signals both at nanoscale in photonics applications. In this paper we show that local surface conductivity tensor well describes resonant plasmonic hyperbolic metasurface far-field near-field regimes, where spatial dispersion usually plays crucial role. We retrieve effective from...

Resonant dielectric structures have emerged recently as a new platform for subwavelength nonplasmonic photonics. It was suggested and demonstrated that magnetic electric Mie resonances can enhance substantially many effects at the nanoscale including spontaneous Raman scattering. Here, we demonstrate stimulated scattering (SRS) isolated crystalline silicon (c-Si) nanoparticles observe experimentally transition from to manifested in nonlinear growth of signal intensity above certain pump...

Optical metasurfaces have great potential to form a platform for manipulation of surface waves.A plethora advanced surface-wave phenomena such as negative refraction, self-collimation and channeling 2D waves can be realized through on-demand engineering dispersion properties periodic metasurface.In this letter, we report on polarization-resolved measurement plasmon supported by an anisotropic metasurface.We demonstrate that subdiffractive array strongly coupled resonant plasmonic...

Solid-state nanopore devices with plasmonic nanoantennas are powerful tools that allow for working individual particles and molecules in solution as well providing light-induced control of ionic current flow through them. However, the manipulation by light still requires high power densities and, thus, results optical heating nanopore. Here, we solve this problem using a 5 nm gap bow-tie nanoantenna on SiNx membrane irradiated broadband spectrum incident light. In regime, photons not only...

In this work, we investigate an all-dielectric metasurface based on the silicon insulator platform for manipulating of guided modes in visible and near-infrared spectral ranges. We use Fourier modal method to demonstrate numerically, that excited support both hyperbolic-like elliptic dispersion regimes. implement a back focal plane microscope combined with high refractive index solid immersion lens directly image isofrequency contours (surface waves). Reconstruction unambiguously reveals...

A micro- or nanosized electrically controlled source of optical radiation is one the key elements in optoelectronic systems. The phenomenon light emission via inelastic tunneling (LEIT) electrons through potential barriers junctions opens up new possibilities for development such sources. In this work, we present a simple approach fabrication nanoscale driven sources based on LEIT. We employ STM lithography to locally modify surface Si/Au film stack heating, which enabled by high-density...

Electrically driven plasmonic nanoantennas can be integrated as a local source of the optical signal advanced photonic schemes for on-chip data processing. The inelastic electron tunneling provides photon generation or launch surface plasmon waves. This process enhanced by density states nanoantennas. In this paper, we used scanning tunnel microscopy-induced light emission to probe optoelectronic properties single gold nanodiscs. electromagnetic field distribution in vicinity structures was...

In this paper, we study light emission from a tunnel contact between the Au film on glass substrate and Au-coated tungsten probe of scanning tunneling microscope at ambient conditions. We investigate dependence intensity collected optical signal surface morphology, namely, geometrical parameters nanometer-scale gold grains (islands) constituting film. reveal that magnitude inelastic current thus photon increase both with decrease island height width. show difference in could reach 4 orders...

Nanoscale electrically driven light-emitting sources with tunable wavelength represent a milestone for implementation of integrated optoelectronic chips. Plasmonic nanoantennas exhibiting an enhanced local density optical states (LDOS) and strong Purcell effect hold promise fabrication bright nanoscale light emitters. Here, we justify gold parabola-shaped nanobumps their ordered arrays produced by direct ablation-free femtosecond laser printing as broadband plasmonic excited probe scanning...

Guided 2D exciton–polaritons, resulting from the strong coupling of excitons in semiconductors with nonradiating waveguide modes, provide an attractive approach toward developing novel on-chip optical devices. These quasiparticles are characterized by long propagation distances and efficient nonlinear interactions but cannot be directly accessed free space. Here we demonstrate a powerful for probing manipulating guided polaritons Ta2O5 slab integrated WS2 monolayer using evanescent through...

Herein, I ( V ) characteristics of the tunnel junction between scanning tunneling microscopy (STM) Pt/Ir probe and atomically flat Au film on mica using ultrahigh vacuum STM is investigated. To ensure cleanness flatness films, optimization substrate annealing Ar plasma treatment are performed. The obtained technological parameters allow to drastically improve reproducibility measurements. analysis ), d 2 /d Fowler–Nordheim plots conducted, presence features in bias region near 1.8 form peak...

Abstract Nanomechanical resonators provide a versatile platform for nanoscale mass sensing and force microscopy, as well enhancing light‐matter interaction offering unique functionality optomechanical applications. In this way, discovering new approaches coupling light with the mechanical degrees of freedom opens strong desire paths further developing nanomechanical technology. Here, parametric optothermal modulation hybrid systems consisting carbon nanowire silicon nanoparticle on its top,...

Hybrid metal–semiconductor nanostructures unifying plasmonic and high-refractive-index materials in a single resonant system demonstrate wide set of unique optical properties. Such systems are perspective for broad palette applications, but the link between their inner structure properties is very sensitive issue, which still not revealed. Here, we describe influence internal microstructure hybrid gold–silicon nanoparticle (the gold with embedded silicon nanograins) on up-conversion...

Optical metasurfaces have great potential to form the platform for manipulation of surface waves. A plethora advanced surface-wave phenomena utilizing negative refraction, self-collimation and channeling 2D waves can be realized through on-demand engineering dispersion properties a periodic metasurface. In this letter, we report on first-time direct experimental polarization-resolved measurement optical plasmons supported by an anisotropic We demonstrate that subdiffractive array strongly...

Metasurfaces offer great potential to control near- and far-fields through engineering of optical properties elementary cells or meta-atoms. Such perspective opens a route efficient manipulation the signals both at nanoscale in photonics applications. In this paper we show that by using an effective surface conductivity tensor it is possible unambigiously describe anisotropic metasurface far- near-field regimes. We begin with retrieving from comparative analysis experimental numerical...

Dielectric nanostructures with a high refractive index are of interest for ultimate control light in the near-field. We demonstrate, experimentally and numerically, existence electric magnetic field hotspots near silicon nanodimers.

Abstract Inelastic electron tunneling in a tunnel junction may be used as an electrical nanosource of surface plasmon polaritons and photons. In this work, we investigate emission from contact between the Platinum/Iridium tip thin Au film on glass. The experiment has shown that intensity can enhancement by use gold nanoantenna located vicinity contact.

At the moment, planar periodic structures such as metasurfaces and photonic crystal slabs attract particular attention, since they can support surface waves guided modes with unusual dispersion properties designed on-demand. Once sample is fabricated, measured dependence of both propagation constant length on wavelength great importance. In this work, we propose an experimental approach allowing to retrieve full complex evanescent lying deeply beneath light line, in arbitrary structures. The...