We report an excitation of surface plasmons in silver nanowires (AgNWs) which were embedded in flexible polymer nanofibers. Using waveguiding excitation, surface plasmons in AgNWs were excited and propagated. By directing light of 650, 532, and 473 nm wavelengths into the nanofiber, surface plasmons in an embedded single AgNW (average diameter 400 nm, length 4.3 μm) were excited and the corresp...

Near-field interactions between plasmons and molecules are treated in a simple unified approach. The density matrix of a molecule is treated with linear-response random phase approximation and the plasmons are treated classically. The equations of motion for the combined system are linear, governed by a simple Liouvillian operator for the polariton (plasmon+molecule excitation) dynamics. The dy...

Graphene plasmons have received significant attention recently due to its attractive properties such as high spatial confinement and tunability. However, exciting plasmons on graphene effectively still remains a challenge owing to the large wave-vector mismatch between the optical beam in air and graphene plasmon. In this paper, we present a novel scheme capable of exciting graphene surface pla...

The injection of a beam of free 50 keV electrons into an unstructured gold surface creates a highly localized source of traveling surface plasmons with spectra centered below the surface plasmon resonance frequency. The plasmons were detected by a controlled decoupling into light with a grating at a distance from the excitation point. The dominant contribution to the plasmon generation appears ...

The study of propagating surface plasmons (PSPs) is an important aspect of the understanding of the interaction between light and metallic surfaces. One of the key concepts related to PSPs, is the dispersion relation. This relation is the basis for understanding of coupling of light to PSPs, by using special approaches to match the wavevector. Moreover, it can be used to predict the matching of...

Graphene hybrids, made of thin insulators, graphene, and metals can support propagating acoustic plasmons (AGPs). The metal screening modifies the dispersion relation usual graphene leading to slowly plasmons, with record confinement electromagnetic radiation. Here, we show that a monolayer, covered by dielectric material an array metallic nanorods be used as robust platform emulate Su-Schrieff...

We systematically investigate the properties of bulk, surface and edge plasmons in Weyl semimetals presence a magnetic field. It is found that unidirectional with different exist on surfaces, which consistent nontrivial topology three-dimensional (3D) bulk plasmons. These novel possess momentum-location lock may travel between surfaces. The anomalous Hall conductivity brings about abundant anis...

We consider the existence of plasmons in a nonequilibrium situation where electrons from the valence band of graphene are pumped to states in the Brillouin zone around the M point by a high intensity UV electromagnetic field. The resulting out-of-equilibrium electron gas is later probed by a weak electromagnetic field of different frequency. We show that the optical properties of the system and...

s and p plasmons in coaxial carbon nanotubes and multishell fullerenes are modeled in analogy with coupled collective excitations in finite, layered, two-dimensional-electron-gas, planar semiconductor superlattices. The curvature of the surface of these complex carbon clusters plays an important role in shaping the dimensionality ~one dimensional, two dimensional, or three dimensional! of the p...

We point out that plasmons in doped graphene simultaneously enable low losses and significant wave localization for frequencies below that of the optical phonon branch Oph 0.2 eV. Large plasmon losses occur in the interband regime via excitation of electron-hole pairs , which can be pushed toward higher frequencies for higher-doping values. For sufficiently large dopings, there is a bandwidth o...