5,369 research outputs found
Trapping and guiding surface plasmons in curved graphene landscapes
We demonstrate that graphene placed on top of structured substrates offers a
novel approach for trapping and guiding surface plasmons. A monolayer graphene
with a spatially varying curvature exhibits an effective trapping potential for
graphene plasmons near curved areas such as bumps, humps and wells. We derive
the governing equation for describing such localized channel plasmons guided by
curved graphene and validate our theory by the first-principle numerical
simulations. The proposed confinement mechanism enables plasmon guiding by the
regions of maximal curvature, and it offers a versatile platform for
manipulating light in planar landscapes. In addition, isolated deformations of
graphene such as bumps are shown to support localized surface modes and
resonances suggesting a new way to engineer plasmonic metasurfaces.Comment: 6 pages, 4 figure
Multipolar third-harmonic generation driven by optically-induced magnetic resonances
We analyze third-harmonic generation from high-index dielectric nanoparticles
and discuss the basic features and multipolar nature of the parametrically
generated electromagnetic fields near the Mie-type optical resonances. By
combining both analytical and numerical methods, we study the nonlinear
scattering from simple nanoparticle geometries such as spheres and disks in the
vicinity of the magnetic dipole resonance. We reveal the approaches for
manipulating and directing the resonantly enhanced nonlinear emission with
subwavelength all-dielectric structures that can be of a particular interest
for novel designs of nonlinear optical antennas and engineering the magnetic
optical nonlinear response at nanoscale.Comment: 24 pages, 6 figure
Tunable nonlinear graphene metasurfaces
We introduce the concept of nonlinear graphene metasurfaces employing the
controllable interaction between a graphene layer and a planar metamaterial.
Such hybrid metasurfaces support two types of subradiant resonant modes,
asymmetric modes of structured metamaterial elements ("metamolecules") and
graphene plasmons exhibiting strong mutual coupling and avoided dispersion
crossing. High tunability of graphene plasmons facilitates strong interaction
between the subradiant modes, modifying the spectral position and lifetime of
the associated Fano resonances. We demonstrate that strong resonant
interaction, combined with the subwavelength localization of plasmons, leads to
the enhanced nonlinear response and high efficiency of the second-harmonic
generation.Comment: 6 pages, 5 figure
Questions associated with the social adaptation of immigrants in the British society from a linguistic point of view
The present research is aimed at studying the peculiarities of linguistic fixation of lexemes that verbalize the processes of mutual social adaptation of both muslim immigrants and members of the british linguistic cultur
Formal bases of optimization procedures of system-object imitation models of processes and systems
The paper discusses some optimization methods for system-object simulation models of processes and systems. The authors proposed some optimization principles in the article in order to increase the efficiency of the system-object analysis of organizational, business and industrial processes by improving the theoretical and instrumental means of optimizing the system-object simulation model
Atlas Data-Challenge 1 on NorduGrid
The first LHC application ever to be executed in a computational Grid
environment is the so-called ATLAS Data-Challenge 1, more specifically, the
part assigned to the Scandinavian members of the ATLAS Collaboration. Taking
advantage of the NorduGrid testbed and tools, physicists from Denmark, Norway
and Sweden were able to participate in the overall exercise starting in July
2002 and continuing through the rest of 2002 and the first part of 2003 using
solely the NorduGrid environment. This allowed to distribute input data over a
wide area, and rely on the NorduGrid resource discovery mechanism to find an
optimal cluster for job submission. During the whole Data-Challenge 1, more
than 2 TB of input data was processed and more than 2.5 TB of output data was
produced by more than 4750 Grid jobs.Comment: Talk from the 2003 Computing in High Energy Physics and Nuclear
Physics (CHEP03), La Jolla, Ca, USA, March 2003, 7 pages, 3 ps figure
Semantic features of the phraseological units with the component light within the artistic discourse
Conduct lexical and semantic analysis on the concept light in the artistic discourse of postmodern fictio
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