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A general discussion of radiative interference processes in plasmonic nanostructures is presented. It will be shown that the interference between subradiant and superradiant plasmon modes can induce pronounced Fano resonances it the optical spectra.
We show theoretically that the hybridization of radiative and guided modes at a metal/dielectric interface, where the dielectric is a homogeneous but anisotropic medium, can lead to the existence of quasi-guided surface plasmon polaritons (SPPs).
A combined computational and experimental study optimizing plasmon-enhanced absorption in Si thin film solar cells presented. A model system consisting of a 2-dimensional periodic /aperiodic arrays of Ag nanostructures on a silica coated Si film supported by a silica substrate is used in the simulations. We develop basic design rules for the realization of broadband absorption enhancements for such...
Electron drag effect in silver film increases dramatically and changes its sign at the resonant condition of the excitation of surface plasmon polariton. Conversely, external voltage applied to the film can modulate its reflectance.
We study a structure consisting of a gold disk array, an SiO2 spacer, and a gold film. We study the effect of spacer thickness on the anti-crossing between localized plasmons and surface plasmon polaritons.
We simulate high-order harmonic generation by low-intensity pulses using plasmon field enhancement near metallic nanostructures and develop a formalism which includes the influence of the metal surface on the HHG process.
We introduce the new concept of microcavity plasmonics: A cut-wire pair is strongly coupled to photonic modes in a microcavity. Large anticrossings of the symmetric and antisymmetric plasmon modes and the cavity modes are observed.
Different plasmonic based devices are fabricated using novel micro and nanofabrication techniques for single molecule detection: Self-similar Ag-nanosphere based plasmonic devices, device comprising tapered nanolens and photonic crystal cavity and, finally, Si micropillars based superhydrobhobic surface.
Low-absorbing materials can be made strongly absorbing by utilizing plasmonic metamaterials. We propose and experimentally validate the concept of a plasmonic MetaMirror which improves energy absorption efficiency by an order of magnitude.
We study two major nonlinear effects in plasmonic structures: second-harmonic generation in metal-insulator-metal waveguides and self-focusing of plasmons propagating along an interface between metal and Kerr-type nonlinear dielectric with the formation of spatial plasmon-polariton solitons.
We study theoretically the perpendicular electrostatic field effect (the quantum confined Stark effect) for excitons and interband surface plasmons in small-diameter (∼1nm) semiconducting carbon nanotubes. We show that the quantum confined Stark effect allows one to control the exciton-plasmon coupling strength in individual nanotubes. This effect may be used for nanotube based tunable optoelectronic...
A combined computational and experimental study optimizing plasmon-enhanced absorption in Si thin film solar cells presented. A model system consisting of a 2-dimensional periodic /aperiodic arrays of Ag nanostructures on a silica coated Si film supported by a silica substrate is used in the simulations. We develop basic design rules for the realization of broadband absorption enhancements for such...
Square periodic arrays of silver nanoparticles featuring plasmonic resonances in the technologically important green spectral region were developed and used to demonstrate plasmon-enhanced light emission from InGaN quantum wells.
This work shows the production of self-assembled elongated nano-objects embedded in an oxide host oriented perpendicular to the substrate and their acousto-plasmonic dynamics. Electromagnetic “hot spots” are created that activate anomalous Raman vibrational modes.
We introduce periodic plasmonic waveguides which support a guided subwavelength slow-light mode over a very broad range of frequencies. The structure consists of a metal-dielectric-metal waveguide side-coupled to a periodic array of metal-dielectric-metal stub resonators.
When molecules are resonantly excited by enhanced near field of silver nanostrips, through a balance between field enhancement and decay modification, Mollow triplet of fluorescence and antibunching of emission photons are found.
A plasmon-mediated mechanism of cooperative emission by an ensemble of dipoles near a metal nanoparticle is studied. The radiation is dominated by plasmonic super-radiant states which survive dipole-dipole interactions and non-radiative losses in the metal.
We present a class of devices called Asymmetric Bowtie nano-Colorsorters. These devices have specifically engineered symmetries enabling them to capture, confine, spectrally filter and steer optical fields while maintaining nanoscale field distributions.
Plasmon stimulated emission gives rise to coherent emission of leakage radiation from adjacent stripes in arrays of bi-metallic structures coated with dye-doped dielectric. This resulted in unambiguous interference patterns imaged by Fourier-plane leakage radiation microscopy.
We discuss the regime where nano-ring laser is feasible in which the absorption loss in metal is compensated by semiconductor gain. A nanometre-scale electrically pumped ring laser design is simulated using multi-level multi-electron FDTD model.
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