M. A. Noginov's research while affiliated with Norfolk State University and other places

Publications (388)

Conference Paper
Anomalous dips in reflection spectra of optical polymers deposited on plasmonic metals have been observed and discussed in terms of singularity of surface plasmon polaritons (SPP’s) in the ultraviolet (UV) part of the spectrum.
Conference Paper
We have studied coupling of dye molecules with surface plasmon polaritons in the Kretschmann geometry and found that the coupling strength and the multi-segment dispersion curves in reflection are strongly different from those in emission.
Article
Full-text available
We have grown arrays of silver nanowires in pores of anodic alumina membranes (metamaterials with hyperbolic dispersion at λ ≥ 615 nm), spin coated them with the dye-doped polymer (HITC:PMMA), and studied the rates of radiative and nonradiative relaxation as well as the concentration quenching (Förster energy transfer to acceptors). The results wer...
Article
Full-text available
We have studied the dependence of concentration quenching of luminescence (donor–acceptor energy transfer) on the thickness d of dye-doped polymeric films (HITC:PMMA) and found its strong inhibition at small values of d. This phenomenon is tentatively explained by a limited number of acceptors, which donors’ excitation can reach in thin samples, if...
Article
Full-text available
We have demonstrated amplified spontaneous emission (ASE) propagating along the planar interface between two adjacent dielectrics with slightly different refractive indexes. This emission originates from the leaky mode, fueled by optical gain in the low-index dielectric, that is outcoupled to the high-index dielectric in vicinity of the critical an...
Article
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A very brief tribute to Mark I. Stockman and his contributions to optical science.
Article
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As lasers get more and more miniaturized and their dimensions become comparable to the wavelength, two interconnected phenomena take place: the fraction of spontaneous radiation going into a specific laser mode (β‐factor) increases and can ultimately reach unity, while the radiative lifetime gets shortened by the Purcell factor Fp. Often it is assu...
Article
Full-text available
We have studied optical properties of single-layer and multi-fold nanoporous gold leaf (NPGL) metamaterials and observed highly unusual transmission spectra composed of two well-resolved peaks. We explain this phenomenon in terms of a surface plasmon absorption band positioned on the top of a broader transmission band, the latter being characterist...
Conference Paper
We have studied the dependence of concentration quenching of luminescence on the thickness d of dye-doped polymeric films (HITC:PMMA) and found a strong inhibition of the donor-acceptor energy transfer (concentration quenching) at small values of d.
Conference Paper
We demonstrated amplified spontaneous emission (ASE) enabled by evanescent gain at an interface between two adjacent dielectrics. The ASE wave is outcoupled to the high-index medium at the critical angle, enabling observation of spectacular emission rings.
Article
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We have studied polymeric (PMMA) films doped with Rhodamine 6G and Rhodamine B laser dyes as potential nonlinear material components for nanophotonics. For both dyes, the optimal concentrations, at which the emission excited via the two-photon-absorption (TPA) process is maximized, have been determined. Despite relatively large values of TPA cross...
Poster
Full-text available
We have studied frequency, angular, and polarization dependence of emission in Fabry-Perot cavities formed by two parallel silver mirrors separated by a layer of polymer (PMMA) doped with Rhodamine R6G (R6G) laser dye in low (c=20 g/l) and high (c=200 g/l) concentrations. ❖ We studied the spectra, and the angular distribution of the emission. We al...
Conference Paper
We found that inhibition of concentration quenching of HITC dye in Fabry-Perot cavities is almost similar to that on top of silver. Low convexity of the emission kinetics suggests strong coupling mediated by surface plasmons.
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.
Article
Understanding and harnessing energy transfer in organic and inorganic systems is of high fundamental and practical importance. In this work, we have experimentally studied the effect of lamellar hyperbolic metamaterials and metal/dielectric interfaces on the concentration-dependent luminescence quenching in thin polymeric poly (methyl methacrylate)...
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...
Article
We have experimentally studied the non-resonant enhancement of spontaneous emission of HITC laser dye in metal-insulator-metal (MIM) waveguides (also referred to as Fabry–Perot cavities). We have found that in the cavities, whose size was too small to support a fundamental or any higher order resonance, the emission decay rate increased, by nearly...
Article
We studied chemiluminescence of rhodamine 6G (R6G) dye in a series of R6G:DNPO:PMMA films deposited onto a variety of metallic, metal–dielectric, and dielectric substrates. We found that chemiluminescence kinetics on top of Ag and Au films covered by an insulating MgF2 layer had longer decay times than those on top of purely dielectric substrates,...
Article
Full-text available
Enhancing electrical conductance in organic semiconductors has been a focus of intense research over the last few decades. The improvement can be made by optimizing either the material or the device architecture. As it has been shown by Orgiu et al., strong coupling of organic molecules with a nanostructured plasmonic substrate can significantly im...
Article
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Photonic structures are commonly designed to manipulate scattered or emitted light. However, in recent years, they were demonstrated to affect a variety of phenomena, including chemical reactions, which lie outside the traditional electrodynamics domain. In this work, we have studied the effect of a Fabry-Perot cavity on the chemical reaction of pr...
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
We studied emission kinetics of HITC dye in disordered metal-dielectric environments and found that the latter, contrary to expectations, can reverse emission kinetics shortening in highly concentrated dyes, caused by a combination of relaxation processes.
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.
Conference Paper
We show that concentration quenching of emission of dye molecules – an energy transfer to quenching centers – is inhibited in subwavelength Fabry-Perot cavities (or metal-insulator-metal, MIM, waveguides).
Article
Coupling of macroscopic ensembles of highly concentrated R6G molecules with aluminum and silver Fabry–Perot cavities of different sizes, in which one or two standing wave modes are in resonance with the absorption transition(s) of the dye molecules, have been studied. (i) It has been found that strong coupling of the cavity with one molecular eigen...
Conference Paper
Full-text available
Enhancing electrical conductivity in organic semiconductors has been a focus of intense research over last few decades. The improvement can be made by optimizing either the material or the device architecture. As it has been shown in [Orgiu et al., Nature Materials, 2015], strong coupling of organic molecules with a nanostructured plasmonic substra...
Article
Full-text available
We fabricated and experimentally studied Au nano-foams and Al2O3 scaffolds filled with Au nanoparticles (NPs). We found that while the reflectance spectra of Au nanofoams depended very little on the 8-10 nm Al2O3 ALD coating, the spectra were highly sensitive to annealing, which increased the sizes of voids and ligaments from 50-100 nm to ∼300 nm....
Article
We have studied the spectroscopic properties of nanoporous alumina membranes impregnated with rhodamine 6G (R6G) dye molecules. At small dye concentrations, the reflectance spectra feature one minimum, corresponding to the absorption band of R6G. With increase of the dye concentration, the reflectance dip splits in two and the energy difference bet...
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...
Presentation
Enhancing charge carrier mobility in organic semiconductors has been a focus of intense research over last few decades. The improvement can be made by optimizing either the material or the device architecture. As it has been shown in [Orgiu et al., Nature Materials, 2015], strong coupling of the PDI2EH-CN2 molecules with a nanostructured plasmonic...
Presentation
Advanced photonics applications require materials with extreme responses to electromagnetic waves in the optical range of the spectrum. The development of metamaterials is a testimony of the substantial progress made in the large-scale exploration of such unique materials. Most of these metamaterials are designed and fabricated using “top down” app...
Article
Broadband plasmonic absorbers are essential components for photovoltaic, photothermal, and light-emitting devices. They are often made by lithographic processes that impart out-of-plane surface features with subwavelength dimensions to metallic films. However, subwavelength photolithography requires flat substrates that limit their applicability an...
Article
p>A thorough study comparing the performance of more than a hundred photonic and plasmonic lasers concludes that the latter are advantageous when their cavity volumes are close to the diffraction limit.</p
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
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
In example of Fabry-Perot cavities filled with dye molecules, we studied a range of strong coupling phenomena in complex systems with multiple exciton and optical resonances, bringing applications of these exciting systems one step closer.
Conference Paper
The long-range inhibition of the luminescence concentration quenching in heavily doped HITC:PMMA polymeric films in the vicinity of lamellar hyperbolic metamaterials and metallic surfaces is tentatively explained in terms of the strong exciton-plasmon coupling.
Article
Laser dyes, in particular, rhodamine 6G (R6G), play an important role in many proof-of-principle demonstrations in metamaterials, nanophotonics, plasmonics, and strong coupling. Despite the numerous experimental and theoretical studies, interpretation of many features in optical spectra of high-concentrated R6G dye is still a subject of controversy...
Article
Strong coupling of excitons in macroscopic ensembles of quantum emitters and cavities (or surface plasmons) can lead to dramatic change of the optical properties and modification of the dispersion curves, characterized by the normal mode splitting of the order of 1 eV. Such gigantic alteration of the hybrid energy states enables scores of unparalle...
Article
We have studied strong exciton-plasmon coupling in the films of Ag nanoislands as well as in the layer-by-layer (LBL) deposited films of Au nanoparticles (NPs) coated with highly concentrated rhodamine 6G (R6G) dye. Their absorbance and the reflectance spectra featured the peaks or dips, which were not characteristic of dye or NPs/nanoislands taken...
Article
Rapidly evolving fields of biomedical, energy, and (opto)electronic devices bring forward the need for deformable conductors with constantly rising benchmarks for mechanical properties and electronic conductivity. The search for conductors with improved strength and strain have inspired the multiple studies of nanocomposites and amorphous metals. H...
Article
We have studied strong exciton-plasmon coupling in the films of Ag nanoislands as well as in the layer-by-layer (LBL) deposited films of Au nanoparticles (NPs) coated with highly concentrated rhodamine 6G (R6G) dye. Their absorbance and the reflectance spectra featured the peaks or dips, which were not characteristic of dye or NPs/nanoislands taken...
Article
Full-text available
We have studied photoinduced reduction of absorption and emission in p3ht, a semiconducting polymer, and found that the rate of photodegradation (destruction of the constituent thiophene rings) does not correlate with the luminescence intensity and, correspondingly, does not depend on the excited state concentration. This conclusion rules out Purce...
Article
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The Kirchhoff law of thermal radiation, relating emissivity {\epsilon} and absorptance {\alpha}, has been originally formulated for opaque bodies in thermodynamic equilibrium with the environment. However, in many systems of practical importance, both assumptions are often not satisfied. In this work, we revisit the century-old law and examine the...
Article
Vanadium dioxide (VO2) is known to have a semiconductor-to-metal phase transition at ∼68 °C. Therefore, it can be used as a tunable component of an active metamaterial. The lamellar metamaterial studied in this work is composed of subwavelength VO2 and Au layers and is designed to undergo a temperature controlled transition from the optical hyperbo...
Article
Full-text available
It has been recently shown that scores of physical and chemical phenomena (including spontaneous emission, scattering and Förster energy transfer) can be controlled by nonlocal dielectric environments provided by metamaterials with hyperbolic dispersion and simpler metal/dielectric structures. At this time, we have researched van der Waals interact...
Article
Optical metamaterials have redefined how we understand light in notable ways: from strong response to optical magnetic fields, negative refraction, fast and slow light propagation in zero index and trapping structures, to flat, thin and perfect lenses. Many rules of thumb regarding optics, such as mu = 1, now have an exception, and basic formulas,...
Article
We demonstrate the strong coupling of dye molecules to surface plasmon polaritons (SPPs) excited in the Kretschmann geometry and propagating at the interface of silver and dye-doped polymer. The dispersion curve of such a system, studied in the reflectometry experiments, is split into three branches and demonstrates an avoided crossing – the signat...
Conference Paper
We studied photoinduced reduction of absorption and emission in p3ht semiconducting polymer and found that the rate of photodegradation does not correlate with the luminescence intensity and does not depend on the excited state concentration.
Conference Paper
The range of applicability of Kirchhoff’s law, predicting that emissivity of opaque bodies in thermodynamic equilibrium with environment which should be equal to absorptance, was studied in Er doped dielectric crystals - potential thermophotovoltaics radiation converters.
Conference Paper
We have studied strong exciton-plasmon coupling in the films of silver nanoislands and layer-by-layer deposited films of gold nanoparticles coated by highly concentrated R6G dye. The experimental results agree with the analytical model.
Conference Paper
We found that strong coupling with the cavity can increase Stokes shift of the dye molecules. The experimental finding is qualitatively explained with the simple model based on the splitting of the excited state parabola.
Article
Full-text available
Proximity to metallic surfaces, plasmonic structures, cavities and other inhomogeneous dielectric environments is known to control spontaneous emission, energy transfer, scattering, and many other phenomena of practical importance. The aim of the present study was to demonstrate that, in spirit of the Marcus theory, the rates of chemical reactions...
Conference Paper
Vanadium oxide (VO2) is known to undergo a semiconductor-to-metal transition at 68°C. Therefore, it can be used as a tunable component of an active metamaterial. The lamellar metamaterial designed and studied in this work is composed of subwavelength VO2 and Au layers and is predicted to have the temperature controlled transition from the hyperboli...
Article
We have demonstrated that the stimulated emission of surface plasmons propagating on top of multilayered hyperbolic metamaterials coated with dye-doped polymeric films has a much lower (2.5-7 times) threshold than that on top of thick Ag films. This observation correlates with more than 2-fold shortening of the spontaneous emission kinetics on top...
Article
Full-text available
We studied angular distributions and spectra of thermal radiation of lamellar metal/dielectric metamaterials with hyperbolic dispersion and compared them with the corresponding characteristics of simple metallic films and pairs of metallic and dielectric layers. The spectra of thermal radiation, in the mid-infrared part of the spectrum, were nearly...