Natalia Noginova

Natalia Noginova
Norfolk State University | NSU

About

182
Publications
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Introduction

Publications

Publications (182)
Article
Full-text available
Permalloy films with one-dimensional profile modulation of submicron periodicity are fabricated based on commercially available DVD-R discs and studied using ferromagnetic resonance method and micromagnetic numerical simulations. The main resonance position shows in-plane angular dependence which is strongly reminiscent of that in ferromagnetic fil...
Conference Paper
Plasmonic structures provide possibilities to control and enhance spontaneous emission, including emission, at weak magnetic transitions, which is of interest for various applications. However, quenching in metal via near field excitations may present significant problems. In our work, we compare systems with dense and dilute arrangement of emitter...
Conference Paper
Significant photoinduced DC electrical effects (currents and potentials) observed in metal films and nanostructures are promising for various applications and present interest from the fundamental physics perspective. They are clearly associated with plasmon excitations, and are the result of strong fields and high field gradients of strongly confi...
Preprint
Full-text available
Permalloy films with one-dimensional (1D) profile modulation of submicron periodicity are fabricated based on commercially available DVD-R discs and studied using ferromagnetic resonance (FMR) method and micromagnetic numerical simulations. The main resonance position shows in-plane angular dependence which is strongly reminiscent of that in ferrom...
Article
Giant enhancement of photocurrents in plasmonic structures (plasmon drag effect) provides opportunities for compact electric monitoring of plasmonic effects, and thus is promising for plasmonic-based sensing applications. In the experiment, we measure photoinduced electric signals in flat and profile-modulated systems, and test their sensitivity to...
Article
Full-text available
The transition from para- to ferromagnetic behavior in magnetic systems can be considered to be a part of a general problem of the transition from quantum (one-particle) to classical (multiple-particle) behavior. Here we present a brief review of recent studies in electron magnetic resonance (EMR) and spin relaxation in situations which are at the...
Article
Full-text available
The generation of significant photocurrents observed in plasmonic metasurfaces is interesting from a fundamental point of view and promising for applications in plasmon-based electronics and plasmonic sensors with compact electrical detection. We show that photoinduced voltages in strongly modulated plasmonic surfaces demonstrate a highly asymmetri...
Conference Paper
Plasmon-induced photocurrents in 1D profile modulated structures switch their polarity in the presence of an additional monolayer at the metal-dielectric interface. The effect presents opportunities for compact plasmonic sensors with electrical detection.
Conference Paper
We have studied optical properties of single and multi-fold nanoporous gold leaf metamaterials and demonstrated that they can be controlled with applied voltage and dielectric environment.
Preprint
The generation of significant photocurrents observed in plasmonic metasurfaces is interesting from a fundamental point of view and promising for applications in plasmon-based electronics and plasmonic sensors with compact electrical detection. We show that photoinduced voltages in strongly modulated plasmonic surfaces demonstrate a highly asymmetri...
Article
Full-text available
We have demonstrated a low-threshold surface-emitting plasmonic laser radiating two symmetrical beams (at 30° from the normal to the sample) characterized by a narrow (≤1 nm) spectral width, and explained its performance in terms of the distributed feedback mechanism. The results of our study provide an extra degree of freedom to the plasmonic lase...
Preprint
We explore coupling of plasmonic, electric and magnetic effects in profile modulated permalloy structures, which have both plasmonic properties and uniaxial magnetic anisotropy with an in-plane easy axis. Strong photocurrents, observed under plasmon resonance conditions, show a clear dependence on the magnetic field with a characteristic hysteresis...
Article
The extra-narrow reflection feature in angular dependence of reflectivity of periodic gold nanostrip arrays presents interest for sensing application. We explore its behavior in a modified dielectric environment and characterize the capability for sensing small changes in the dielectric permittivity of the environment.
Presentation
Electrochromic Polymer Switching in Nanostructured Plasmonic Environment
Article
The spontaneous emission of weak magnetic dipoles located in the vicinity of a plasmonic metal is analyzed theoretically and studied experimentally using Eu3+ ions in organic matrices as a spectroscopic probe. We show that close distances to metal are preferable for magnetic light enhancement experiments, as magnetic dipoles show weaker quenching t...
Article
Mie-resonant high-index dielectric nanoparticles and metasurfaces have been suggested as a viable platform for enhancing both electric and magnetic dipole transitions of fluorescent emitters. While the enhancement of the electric dipole transitions by such dielectric nanoparticles has been demonstrated experimentally, the case of magnetic-dipole tr...
Conference Paper
Full-text available
Photoinduced voltages in metal films with rectangular profile modulation demonstrate sharp polarity switching at plasmon resonance conditions. We explore this effect for applications for compact plasmonic sensors with electrical detection.
Conference Paper
Full-text available
We have synthesized a series of near-infrared rare-earth doped organic materials for nanophotonics applications and studied their absorption and emission properties. The developed materials show promise as research tools and (meta)device components.
Preprint
Full-text available
Ultra-thin monolayer films of Eu(TTA)3(L1a) were fabricated by Langmuir-Blodgett technique on plasmonic and dielectric substrates and were used to probe the optical effect of local environment on magnetic dipole emission and charge transfer processes. The goal of our research is the development of luminescent materials with rare earth ions, capable...
Conference Paper
Electrochromic materials demonstrating reversible color upon application of a small voltage are of interest for various optoelectronic applications. Polyaniline (PANI) is a promising material due to its high conductivity, high contrast in coloration change, low operation voltages, and long-term stability without degradation as compared to other con...
Presentation
Electrochromic materials demonstrating reversible color upon application of a small voltage are of interest for various optoelectronic applications. Polyaniline (PANI) is a promising material due to its high conductivity, high contrast in coloration change, low operation voltages, and long-term stability without degradation as compared to other con...
Poster
Strong modification of local optical environment in close vicinity of plasmonic metal can result in alteration of various quantum processes, including spontaneous emission, absorption, energy or charge transfer processes. Rare earth ions can be used as spectroscopic probe to study and probe the effects of plasmonic environment. Lanthanide complex E...
Research
Ln³⁺ ions ability to harvest IR photons from the solar light spectrum. NIR photons account for (53%) of the solar light spectrum and photons are lost during solar cell light absorption due to several key factors. Ln³⁺ ions are perfect candidates to optimize NIR photons absorption in solar cell devices by the utilization of upconversion (UC) process...
Preprint
The possibility to use surface plasmon polaritons for enhancement of weak magnetic dipole transitions is analyzed theoretically and demonstrated experimentally for simple flat geometry and sine-wave profile modulated plasmonic films. Spontaneous emission of Eu3+ in organic matrices deposited onto plasmonic surfaces demonstrates specific angular and...
Article
We have observed directional spontaneous emission of rhodamine 6G dye deposited on top of a silver grating and found that its angular distribution patterns were very different in TE and TM polarizations. The latter was related to the dispersion curves determined based on the polarized reflection spectra measured at multiple incidence angles. The mo...
Conference Paper
We have observed double crescent patterns in the TE polarized spontaneous emission of rhodamine 6G dye deposited onto silver grating metasurface. It originates from the surface wave characterized by the effective index of refraction n=1.03.
Conference Paper
Full-text available
We have demonstrated the novel low-threshold surface-emitting plasmonic laser and explained its performance in terms of the distributed feedback mechanism, providing a new degree of freedom to the laser design.
Conference Paper
Full-text available
Ultra-thin films of Eu(TTA)3(L1a) have been fabricated by Langmuir-Blodgett technique on plasmonic and dielectric substrates and used to probe the effect of local environment on magnetic dipole emission and charge transfer processes.
Conference Paper
Photoinduced voltages in profile-modulated plasmonic surfaces demonstrate sharp dependence on the incidence angle and are very sensitive to dielectric environment, which provides opportunities for applications in compact plasmonic sensors with electrical detection.
Article
We show that spin angular momentum (SAM) of light is transferred to matter together with momentum and energy, and obtain the expression for the corresponding torque. This can lead to appearance of spin forces, which correspond to the discrepancy between the Lorentz and Einstein-Laub forces. In plasmonic metals these spin forces result in a plasmoga...
Article
Excitation of collective plasmonic modes and their effect on optical behavior are experimentally and theoretically studied in 1D arrays of gold nanostrips in comparison with continuous gold films with periodically modulated profile. In strips, the angular dependence of the reflectivity demonstrates a peak at the resonance condition as opposed to a...
Chapter
The plasmon drag effect was discovered about a decade ago in 2005. Since then, it has attracted considerable attention from the nanotechnology and photonics community due to fundamental physics of this effect as manifestation of electron plasmon coupling and myriad of possible applications in nanoelectronics, photonics and sensing. In this chapter,...
Article
Full-text available
We introduce the continuity equation for the electromagnetic spin angular momentum (SAM) in matter and discuss the effects of the SAM transfer to materials. The corresponding torque can be represented using spin forces, which we describe in this manuscript. We show that the spin forces are expected to result in pinning the plasmon drag effect or pl...
Article
Full-text available
The electromagnetic momentum loss approach is applied to predict the plasmon drag effect in profile-modulated gold films at different amplitudes of surface modulations. Direct proportionality of energy and momentum transfer in interactions of plasmons and free electrons in metal is proven to be valid for surfaces with relatively low height modulati...
Article
Full-text available
Electron magnetic resonance is experimentally studied in dilute solid suspensions of iron oxide nanoparticles as the function of the particle size, and discussed in the frames of the modified giant spin approach. Gradual evolution of features specific for small nanoparticles including a narrow component at the main resonance field and a weak half-f...
Article
Full-text available
Superparamagnetic nanoparticles containing hundreds and thousands of coupled electron spins are on the boundary between classical and quantum behavior, and demonstrate features which are typical for paramagnetic spins and absent in macroscopic ferromagnetic systems. In order to better understand the evolution of magnetization dynamics from quantum...
Article
Light-matter momentum transfer in plasmonic materials is theoretically discussed in the framework of a plasmonic pressure mechanism taking into account nonequilibrium electron dynamics and the thermalization process. We show that our approach explains the experimentally observed relationship between the plasmon-related electromotive force and the a...
Article
Plasmon drag effect is studied theoretically and experimentally in gold films with a sine-wave height profile. Numerical simulations based on the modified electromagnetic momentum loss approach are shown to correctly describe the photoinduced voltage associated with propagating surface plasmon polaritons. Direct proportionality of energy and moment...
Article
Full-text available
Single crystals of Ln(NO 3 ) 3 ·Bpy 2 where Ln = Eu, Gd, Nd, Tm, Er, La and Yb were fabricated and characterized. Materials have good optical quality, can be excited at UV or the rare earth ion transitions, demonstrate efficient luminescence and are suitable for thin film fabrication. Fabrication approaches and possible applications are discussed.
Conference Paper
Gold nanostrip arrays exhibit collective plasmonic oscillations analogous to surface plasmon-polaritons in continuous films with a spatially modulated profile. Similarities and differences in optical behavior of continuous and discontinuous systems are studied experimentally and theoretically.
Conference Paper
The proposed hot-electron-mediated plasmonic pressure model explains the observed relationship between plasmon drag emf and absorption, emphasizes its quantum plasmonics nature and allows for correct calculation of the emf in metal for the first time.
Conference Paper
Plasmonics is promising for future electronics as it can combine optical speed of operation with nanoscale size, something which is not possible with traditional optics and electronics [1]. Coupling of photons, plasmonic excitations and electrons is of key importance as it provides opportunities to monitor or control plasmonic nanocircuits electric...
Article
Full-text available
We have synthesized gyroidal TiN metamaterials, studied their optical properties, and compared them with the optical properties of the TiN thin films fabricated using reactive magnetron sputtering. The plasma frequency, ωp, and the corresponding free carrier concentration, N, in the gyroid samples were found to be much lower than those in thin film...
Article
Full-text available
We study electric signals associated with surface plasmon propagation in rough and smooth silver films. The polarity of the signal can be controlled with light illumination and system geometry.
Article
Full-text available
We demonstrate the enhancement of magnetic dipole spontaneous emission from Eu3+ ions by an engineered plasmonic nanostructure that controls the electromagnetic environment of the emitter. Using an optical microscope setup, an enhancement in the intensity of the Eu3+ magnetic dipole emission was observed for emitters located in close vicinity to a...
Article
Systems with a single or several coupled electron spins are commonly described with the quantum approach while ferromagnetic domains with millions of coupled spins are classical systems. Large spin clusters and superparamagnetic nanoparticles contain hundreds of coupled electron spins, and are on the boundary between classical and quantum behavior....
Article
Incorporation of ferromagnetic materials into metamaterial systems provides an opportunity to tune microwave permeability with an external magnetic field, strongly affecting wave propagation. We characterize microwave properties of several soft magnetic materials with high permeability as possible candidates for such applications. In the range of t...
Conference Paper
Full-text available
We probe effects of field enhancements in silver-dielectric layers using a highly luminescent organic system with Eu3+. Significant enhancement in the excitation spectra is observed at the spectral range corresponding to epsilon-near zero for silver.
Conference Paper
Full-text available
We use spontaneous emission of Eu3+ ions as a spectroscopic tool to probe modifications of optical fields in close vicinity of metal and under the conditions of the optically-induced magnetic resonance.
Article
Full-text available
Strong modification of spontaneous emission of Eu3+ ions placed in close vicinity to thin and thick gold and silver films was clearly demonstrated in a microscope setup separately for electric and magnetic dipole transitions. We have shown that the magnetic transition was very sensitive to the thickness of the gold substrate and behaved distinctly...
Article
Full-text available
In order to better understand the mechanism of the photon drag effect in plasmonic nanostructures, photo-induced electric signals have been studied in gold and silver films and various plasmonic nanostructures. The spectral dependence of the effect points to the primary role of individual localized plasmon resonances in the photo-induced electromot...
Article
Full-text available
In order to investigate the effects of plasmonic environments on spontaneous emission of magnetic and electric dipoles, we have studied luminescence of Eu<sup>3+</sup> ions in close vicinity to gold nanostrip arrays. Significant changes in the emission kinetics, emission polarization, and radiation patterns have been observed in the wavelength rang...
Article
Commonly, metamaterials are systems with engineered electric response, based on optimized spatial arrangement of sub-wavelength sized metal and dielectric components. We explore alternative methods based on use of magnetic inclusions, such as magnetic nanoparticles, which can allow microwave permeability of a composite to be tuned from negative to...
Article
Luminescence of Eu ions was used to study effects of plasmonic environment on spontaneous emission of magnetic and electric dipoles in several nanostructured systems, including gold nanostrips, gold and silver nanomesh and thin films. Significant changes in polarization and radiation patterns were observed in the spectral range of plasmonic resonan...
Article
Strong photon drag was observed in thin metal films and nanostructures, with the maximum of the effect at plasmon resonance conditions. To better understand mechanism of the effect and explore the possibility to control it with nanoscale geometry, we studied photoinduced currents in gold films and nanomesh structures in the dependence on the wavele...
Article
Strongly different behavior of magnetic and electric dipole spontaneous emission is observed in close vicinity of gold and silver. Effects can be used to study and map modifications of local optical environment in plasmonic systems.
Article
Full-text available
Commonly, metamaterials are electrically engineered systems with optimized spatial arrangement of subwavelength sized metal and dielectric components. We explore alternative methods based on use of magnetic inclusions, such as magnetic nanoparticles, which can allow permeability of a composite to be tuned from negative to positive at the range of m...
Article
The quadrupole coupling constants, asymmetry parameters and spin-lattice relaxation time of27A1 nuclei have been studied in Mn-doped YAlO3 crystals. The dependence of the relaxation time on temperature and concentration of Mn ions implies a mechanism of relaxation via Mn2+ paramagnetic ions taking into account the nuclear spin diffusion partly rest...
Conference Paper
Spontaneous emission of Eu3+ is significantly modified in close vicinity of metal and nanostructured metal systems. The effects are different than those predicted by the “image model”, and ascribed to strong coupling with plasmonic modes.
Article
Acceleration of the longitudinal spin relaxation kinetics, associated with the presence of magnetic nanoparticles (MNPs), has been analysed based on the diffusion mechanism of the spin relaxation. The predictions of the outer sphere model were tested in viscous systems and complex multiphase systems, where different components had different mobilit...
Article
In order to better understand the origin of “forbidden” quantum transitions observed in superparamagnetic nanoparticles at low magnetic fields, electron magnetic resonance (EMR) studies have been performed at room temperature on iron oxide nanoparticles assembled inside parallel nanosized channels penetrating the anodic alumina membrane. The positi...
Article
In thin silver films we have observed strong photon drag effect (PDE) enhanced by surface plasmon polaritons (SPPs) excited in a Kretschmann geometry at the SPP resonant angle. A weaker PDE of an opposite polarity has been detected at off-resonance incidence angles. We have also found that SPPs can be controlled by an external dc current propagatin...
Article
Strong enhancement of the photon drag effect due to nanostructuring of the surface has been demonstrated in thin metal films.
Article
We demonstrate a fluid metamaterial consisting of gold nanorods coated with an organic molecular corona, whose anisotropy can be controlled by applied mechanical shear force. ©2011 Optical Society of America OCIS codes: (160.3918) Metamaterials; (160.3900) Metals; (350.4238); Nanophotonics and photonic crystals Metamaterials with hyperbolic dispers...
Article
Colossal magnetoresistance (CMR) based bolometers were discussed for pulse and modulated electromagnetic radiation detection. The effective time of slow bolometric response observed in CMR films was determined by slow phonon cooling of the film and the substrate. The additional features in bolometric response appeared due to glass-like state transi...