We discuss the properties of surface plasmons-polaritons in graphene and describe three possible ways coupling electromagnetic radiation terahertz (THz) spectral range to this type waves. (i) attenuated total reflection (ATR) method using a prism Otto configuration, (ii) micro-ribbon arrays or monolayers with modulated conductivity, (iii) metal stripe on top layer, (iv) graphene-based gratings. The text provides number original results along their detailed derivation discussion.

We use an exact solution of the relaxation-time Boltzmann equation in a uniform AC electric field to describe nonlinear optical response graphene terahertz (THz). The cases monolayer, bilayer and ABA-stacked trilayer are considered, monolayer species is shown be most appropriate one exploit free electron response. find that single layer shows bistability THz range, within electromagnetic power range attainable practice. current associated with third harmonic generation also computed.

We study the interaction of electromagnetic (EM) radiation with single-layer graphene and a stack parallel sheets at arbitrary angles incidence. It is found that behavior qualitatively different for transverse magnetic (or p-polarized) electric s-polarized) waves. In particular, absorbance attains minimum (maximum) p (s)-polarization angle total internal reflection when light comes from medium higher dielectric constant. case equal constants media above beneath graphene, grazing incidence...

Quantum systems are inherently open and susceptible to environmental noise, which can have both detrimental beneficial effects on their dynamics. This phenomenon has been observed in biomolecular systems, where noise enables novel functionalities, making the simulation of dynamics a crucial target for digital analog quantum simulation. Nevertheless, computational capabilities current devices often limited due inherent noise. In this work, we present approach that capitalizes intrinsic reduce...

It is shown that one can explore the optical conductivity of graphene, together with ability controlling its electronic density by an applied gate voltage, in order to achieve resonant coupling between external electromagnetic radiation and surface plasmon-polaritons graphene layer. This opens possibility electrical control intensity light reflected inside a prism placed on top layer, switching regimes total reflection absorption. The predicted effect be used build graphene-based...

Nanocomposites consisting of a dielectric matrix, such as TiO2, with embedded noble metal nanoparticles (NPs) possess specific optical properties due to the surface plasmon resonance (SPR) effect, interesting for several applications. The aim this work is demonstrate that these are sensitive nanostructure magnetron-sputtered TiO2/Au thin films, which can be tuned by annealing. We study role shape and size distribution NPs, well influence crystallinity phase composition host matrix on...

We analyze the propagation of electromagnetic waves along surface a nonlinear dielectric medium covered by graphene layer. reveal that this system can support and stabilize transverse electric (TE) plasmon polaritons. demonstrate these TE modes have subwavelength localization in direction perpendicular to surface, with intensity much higher than an incident wave which excites polariton.

This work presents a comprehensive review on gas sensors based localized surface plasmon resonance (LSPR) phenomenon, including the theory of LSPR, synthesis nanoparticle-embedded oxide thin films, and strategies to enhance sensitivity these optical sensors, supported by simulations electromagnetic properties. The LSPR phenomenon is known be responsible for unique colour effects observed in ancient Roman Lycurgus Cup at windows medieval cathedrals. In both cases, result from interaction...

Magnons and plasmons are different collective modes, involving the spin charge degrees of freedom, respectively. Formation hybrid plasmon-magnon polaritons in heterostructures plasmonic magnetic systems faces two challenges, small interaction electromagnetic field plasmon with spins, energy mismatch, as most have energies orders magnitude larger than those magnons. We show that graphene form magnons two-dimensional ferromagnetic insulators, placed up to half a micrometer apart, Rabi...

Abstract This paper gives an overview of theoretical and experimental results on Raman‐active optical phonon modes confined in nearly spherical nanocrystals (NCs) polar semiconductor materials with cubic crystal structure. A systematic consideration the effect reduced dimensionality both electrons phonons is presented. The approach based a continuum lattice dynamics model effective mass approximation for electronic states NCs. Calculated resonant non‐resonant Raman scattering spectra are...

Asymmetric metal–ferroelectric–metal (MFM) structures were manufactured by sol–gel deposition of a lead zirconate-titanate (PZT with Zr/Ti ratio 65/35) film on Pt-coated Si, Au top electrode. The average remnant polarization 9 μC/cm2 and the coercive field 39 kV/cm obtained from hysteresis loop measurements. A detailed analysis polarization–electric (P–E), capacitance–voltage (C–V), current–voltage (I–V) measurement results allowed us to estimate near-electrode space-charge region thickness...

It is shown that an attenuated total reflection structure containing a graphene layer can operate as tunable polarizer of the electromagnetic radiation. The polarization reflected wave controlled by adjusting voltage applied to via external gate, demonstrated for cases linearly and circularly polarized incident mechanism based on resonant coupling p-polarized waves surface plasmon-polaritons in graphene. presented calculations show that, at resonance, almost 100% s-polarized.

It is shown that monolayer graphene deposited on a spatially periodic gate behaves as polaritonic crystal. Its band structure depending the applied voltage studied. The scattering of electromagnetic radiation from such crystal presented calculated and its spectral dependence analyzed in terms Fano-type resonances between reflected continuum plasmon-polariton modes forming narrow bands.

In this paper we study the formation of topological Tamm states at interface between a semi-infinite one-dimensional photonic-crystal and metal. We show that when system is topologically non-trivial there single state in each band-gaps, whereas if it trivial band-gaps host no states. connect disappearance with transition from to one. This driven by modification dielectric functions unit cell. Our interpretation further supported an exact mapping solutions Maxwell's equations existence...

Classical non-perturbative simulations of open quantum systems' dynamics face several scalability problems, namely, exponential scaling the computational effort as a function either time length simulation or size system. In this work, we propose use Time Evolving Density operator with Orthogonal Polynomials Algorithm (TEDOPA) on computer, which term Quantum TEDOPA (Q-TEDOPA), to simulate systems linearly coupled bosonic environment (continuous phonon bath). By performing change...

Multiphonon processes in a model quantum dot (QD) containing two electronic states and several optical phonon modes are considered by taking into account both intra- interlevel terms. The Hamiltonian is exactly diagonalized, including finite number of multiphonon large enough to guarantee that the result can be exact physically important energy region. physical properties studied calculating Green's function QD dielectric function. When interactions included, calculated spectra allow...

We provide an analytical solution to the problem of scattering electromagnetic radiation by a square-wave grating with flat graphene sheet on top. show that for deep groves there is strong plasmonic response, light absorption in reaching more than 45% due excitation surface plasmon-polaritons. The case presenting induced periodic modulation conductivity also discussed.

We have studied light emission kinetics and analyzed carrier recombination channels in HgTe quantum dots that were initially grown H2O. When the solvent is replaced by D2O, nonradiative rate changes highlight role of vibrational degrees freedom medium surrounding dots, including both ligands. The contributing energy loss mechanisms been evaluated developing quantitative models for via (i) polaron states formed strong coupling ligand vibration modes to a surface trap state (nonresonant...

Exciton-polariton modes arising from interaction between bound excitons in monolayer thin semiconductor sheets and photons a Fabry-Perot microcavity are considered theoretically. We calculate the dispersion curves, mode lifetimes, Rabi splitting, Hopfield coefficients of these structures for two nearly 2D materials, ${\text{MoS}}_{2}$ ${\text{WS}}_{2}$, suggest that they interesting studying rich physics associated with Bose-Einstein condensation exciton polaritons. The large binding energy...

Noise in quantum devices is generally considered detrimental to computational accuracy. However, the recent proposal of noise-assisted simulation has demonstrated that noise can be an asset digital simulations open systems on Noisy Intermediate-Scale Quantum (NISQ) devices. In this context, we introduce optimized decoherence rate control scheme significantly reduce requirements by multiple orders magnitude, comparison original simulation. We further extend approach encompass Lindblad...

Abstract Optical phonon modes, confined in CdS x Se 1− nanocrystal (NC) quantum dots (≈2 nm radius) grown a glass matrix by the melting‐nucleation method, were studied resonant Raman scattering (RRS) spectroscopy and theoretical modeling. The formation of nanocrystalline (QDs) is evidenced observation absorption peaks theoretically expected resonance bands RRS excitation spectra. This system, ternary alloy, offers possibility to investigate interplay between effects localization disorder...