We analyze the properties of microstructured materials with negative refraction, so-called left-handed metamaterials. consider a two-dimensional periodic structure created by arrays wires and split-ring resonators embedded into nonlinear dielectric, calculate effective electric permittivity magnetic permeability. demonstrate that hysteresis-type dependence permeability on field intensity allows changing material from left- to right-handed back. These effects can be treated as second-order...

We study both linear and nonlinear surface waves localized at the interface separating a left-handed (LH) medium (i.e., with negative dielectric permittivity magnetic permeability) conventional [or right-handed (RH)] medium. demonstrate that can support TE- TM-polarized waves-surface polaritons, we their properties. describe intensity-dependent properties of in three different cases, i.e., when LH RH media are either is nonlinear. In case nonlinear, find two types waves, one maximum...

We study the second-harmonic generation in left-handed metamaterials with a quadratic nonlinear response. demonstrate novel type of exact phase matching between backward propagating wave fundamental frequency and forward second harmonics. show that this parametric process can convert surface metamaterial into an effective mirror totally reflecting harmonics generated by incident wave. derive analyze theoretically coupled-mode equations for semi-infinite metamaterial. also numerically slab...

We study the beam reflection from a layered structure with left-handed metamaterial. predict giant lateral (Goos-Hanchen) shift and splitting of due to resonant excitation surface polaritons vortex-like energy flow between right- materials.

We suggest using tapered waveguides for compensating losses of surface plasmon-polaritons in order to enhance nonlinear effects at the nanoscale. study plasmon self-focusing metal-dielectric-metal slot and demonstrate that, by an appropriate choice taper angle, we can effectively suppress mode attenuation achieving stable propagation a spatial soliton. For larger tapering angles observe plasmon-beam nanofocusing both dimensions.

We study the electromagnetic beam reflection from layered structures that include so-called double-negative materials, also called left-handed metamaterials. predict such can demonstrate a giant lateral Goos-Hanchen shift of scattered accompanied by splitting reflected and transmitted beams due to resonant excitation surface waves at interfaces between conventional materials as well leaky modes in structures. The be either positive or negative, depending on type guided excited incoming beam....

We study one- and two-dimensional transmission of electromagnetic waves through a finite slab dielectric material with negative refraction. In the case when possesses an intensitydependent nonlinear response, we observe nonlinearity-induced wave opaque accompanied by generation spatiotemporal solitons. solve this problem numerically, employing finite-difference time-domain simulations, for parameters microstructured materials refractive index in microwave region, but our results can be...

We introduce the concept of subwavelength imaging with an opaque nonlinear left-handed lens by generating second-harmonic field. consider a slab composite metamaterial quadratic response and show that such flat can form, under certain conditions, image field source being at fundamental frequency.

We show that the magneto-optic Kerr effect can be significantly enhanced in composite nanostructured metamaterials due to plasmon dipole resonance of individual particles making up composite. find contrast continuous ferromagnetic medium film possesses a nontrivial frequency-dependent optical response which potentially used for data recording and processing as well diagnostics magnetization state films.

We show that disorder can modify dramatically the effective magnetic response of a composite metamaterial including its specific property negative refraction. demonstrate relatively weak in parameters split-ring resonators reduce and even completely eliminate finite frequency range where possesses left-handed properties. This effect is expected to be crucially important for design metamaterials operating terahertz or visible region spectrum.

We introduce a new concept of the nonlinear control invisibility cloaking. study scattering properties multi-shell plasmonic nanoparticles with response one shells, and demonstrate that cross-section such particles can be controlled by power incident electromagnetic radiation. More specifically, we either increase or decrease changing intensity external field, as well efficiently even reverse radiation direction.

We analyze nonlinear surface modes supported by a metal-dielectric nanostructured metamaterial with layer. demonstrate that such semi-infinite structure can support both TE and TM polarized the subwavelength localization, which be regarded as an optical analog of electronic Tamm states. Such states may appear even in cases when linear do not exist.

We introduce a new type of metamaterial, which we call liquid metacrystals (LMCs), consisting elongated particles (meta-atoms) suspended in viscous liquid. A constant homogeneous external electric field applied to such material induces polarization the meta-atoms and orients them along one axis, resulting anisotropic electromagnetic properties system. The axis anisotropy can be reoriented, this tunability resembles that crystals nematic phase. Moreover, also reorient response high-frequency...

Using the quasi-particle approach, we studied problem of reflection quadratic spatial solitons from an interface between two χ(2) media with slightly different linear and nonlinear properties. The possibility soliton capture by associated surface wave excitation is shown. calculations are carried out for well-known single as well a novel type multihump soliton, which obtain new analytical expression in nonlocal limit first time to our knowledge.

We analyze transmission of electromagnetic waves through a one-dimensional periodic layered structure consisting slabs left-handed metamaterial and air. derive the effective parameters from microscopic wires split-ring resonators possessing characteristics in microwave frequency range, then study, by means transfer-matrix approach finite-difference time-domain numerical simulations, properties this band gap associated with zero averaged refractive index. By introducing defects, such can be...

We describe the properties of specific non-reflecting birefringent left-handed metamaterials and demonstrate a perfect lens for vectorial fields. predict that, in sharp contrast to concept conventional realized at = μ −1 (where is dielectric permittivity magnetic permeability), slab possesses property negative refraction either TE- or TM-polarized waves both them simultaneously. This allows selective focusing spatial separation images created different polarizations. discuss several...

We suggest an alternative way of terahertz radiation generation utilizing the effect spontaneous symmetry breaking in a nonlinear metallic nanodimer illuminated by light. show that is caused instability plasmon eigenmodes system and can lead either to magnetization dimer or periodic self-modulation regime light scattering. find modulation frequency lies band may be tuned within wide range.

We propose an alternative technique of continuous-wave terahertz radiadion generation based on light scattering by a two-dimensional flat lattice nonlinear metallic nanodimers. show that it may be accompanied plasmon-driven modulation instability the polarization resulting in periodic oscillations both transmitted and reflected envelopes. find frequency lies band can tuned within wide range, from units up to several tens terahertz, varying incident intensity frequency. also compare suggested...

We show that transverse electromagnetic waves propagating along an external static electric field in liquid metacrystal (LMC) can provoke spontaneous rearrangement of elongated meta-atoms changes the direction anisotropy axis LMC. This kind instability may reorient from equilibrium state parallel to a high-frequency and back at different threshold intensities such way bistability system takes place. Reorientation causes change effective refraction index LMC creates, turn, conditions for...

We analyze nonlinear properties of microstructured materials with negative refraction, the so-called left-handed metamaterials. demonstrate that hysteresis-type dependence magnetic permeability on field intensity allows changing material from left- to right-handed and back. Using finite-difference time-domain simulations, we study wave transmission through slab material, predict existence temporal solitons in such materials. also metamaterials can support both TE- TM-polarized self-trapped...

Abstract We study theoretically a nonlinear response of the planar metal/dielectric nanostructures constituted from periodical array ultra thin silver layers and Kerr-like dielectric. predict hysteresis-type dependences components tensor effective dielectric permittivity on field intensity allowing change in material transmission properties transparent to opaque back at extremely low intensities light. It makes possible control light by all-optical nanoscale devices circuits.

We consider the structure of a thermal phase-slip center for simple microscopic model clean one-dimensional superconductor in which superconductivity occurs only within one conducting channel or several identical channels. Surprisingly, Eilenberger equations describing saddle-point configuration allow an exact analytical solution whole temperature and current range. This allows us to derive closed expression free-energy barrier, we use compute its dependences.

The present paper is devoted to an investigation of the influence radiative losses upon spatial dynamics self-consistent waveguide channels that are localized near interfaces between linear and Kerr-type nonlinear dielectric media. It shown effects, through their dependence on intensity electromagnetic fields, initial channel position, its angle inclination interface, can lead either total disappearance a formation, or displacement, deep into medium, as consequence loss some part energy....