This book is meant as an introduction to graphene plasmonics and aims at the advanced undergraduate graduate students entering field of in graphene. In it different theoretical methods are introduced, starting with elementary description evolving towards more topics. essentially self-contained brings together a number topics about that scattered vast literature. The text composed eleven chapters set detailed appendices. It can be read two ways: Reading only get acquainted or reading studying...

Abstract Plasmon–emitter interactions are of central importance in modern nanoplasmonics and generally maximal at short emitter–surface separations. However, when the separation falls below 10–20 nm, classical theory deteriorates progressively due to its neglect quantum effects such as nonlocality, electronic spill-out, Landau damping. Here we show how this can be remedied a unified theoretical treatment mesoscopic electrodynamics incorporating Feibelman $$d$$ <mml:math...

The field of two-dimensional (2D) materials-based nanophotonics has been growing at a rapid pace, triggered by the ability to design nanophotonic systems with in situ control, unprecedented number degrees freedom, and build material heterostructures from bottom up atomic precision. A wide palette polaritonic classes have identified, comprising ultraconfined optical fields, even approaching characteristic length-scales single atom. These advances real boost for emerging quantum nanophotonics,...

We theoretically explore the role of mesoscopic fluctuations and noise on spectral temporal properties systems $\mathcal{PT}$-symmetric coupled gain-loss resonators operating near exceptional point, where eigenvalues eigenvectors coalesce. show that inevitable detuning in frequencies uncoupled leads to an unavoidable modification conditions for reaching while, as this point is approached ensembles resonator pairs, statistical averaging significantly smears features. also discuss how these...

Abstract Polaritons, resulting from the hybridization of light with polarization charges formed at boundaries between media positive and negative dielectric response functions, can focus into regions much smaller than its associated free‐space wavelength. This property is paramount for a plethora applications in nanophotonics, ranging biological sensing to photocatalysis nonlinear quantum optics. In two‐dimensional (2D) limit, represented by atomically thin van der Waals (vdW) materials...

Rooted in quantum optics and benefiting from its well-established foundations, strong coupling nanophotonics has experienced increasing popularity recent years. With being an experiment-driven field, the absence of appropriate theoretical methods to describe ground-breaking advances often emerged as important issue. To address this problem, temptation directly transfer extend concepts already available is strong, even if a rigorous justification not always available. In review we discuss...

The realization and control of polaritons is paramount importance in the prospect novel photonic devices. Here, we investigate emergence plasmon-exciton hybrid structures consisting a two-dimensional transition-metal dichalcogenide (TMDC) deposited onto metal substrate or coating metallic thin film. We determine polaritonic spectrum show that, former case, addition top dielectric layer and, latter thickness film can be used to tune promote interactions well within strong-coupling regime. Our...

Noble metal nanostructures are ubiquitous elements in nano-optics, supporting plasmon modes that can focus light down to length scales commensurate with nonlocal effects associated quantum confinement and spatial dispersion the underlying electron gas. Nonlocal naturally more prominent for crystalline noble metals, which potentially offer lower intrinsic loss than their amorphous counterparts, particular crystal facets giving rise distinct electronic surface states. Here, we employ a...

Historically, the field of plasmonics has been relying on framework classical electrodynamics, with local-response approximation material response being applied even when dealing nanoscale metallic structures. However, confinement electromagnetic radiation approaches atomic scales, mesoscopic effects are anticipated to become observable, e.g., those associated nonlocal electrodynamic surface electron gas. Here, we investigate in propagating gap plasmon modes ultrathin metal-dielectric-metal...

In this paper, we study zigzag graphene nanoribbons with edges reconstructed Stone-Wales defects, by means of an empirical (first-neighbor) tight-binding method, parameters determined ab initio calculations very narrow ribbons. We explore the characteristics electronic band structure a focus on nature edge states. Edge reconstruction allows appearance new type They are dispersive, nonzero amplitudes in both sublattices; furthermore, have two components that decrease different decay lengths...

In this paper, we analyze the effects of nonlocality on optical properties a system consisting thin metallic film separated from graphene sheet by hexagonal boron nitride (hBN) layer. We show that nonlocal in metal have strong impact spectrum surface plasmon-polaritons graphene. If is nanostructured into periodic grating, resulting extinction curves can be used to shed light importance metals. Therefore plasmons emerge as tool for probing nanostructures, including films. As byproduct our...

We theoretically analyze the hybrid Mie-exciton optical modes arising from strong coupling of excitons in organic dyes or transition-metal dichalcogenides with Mie resonances high-index dielectric nanoparticles. Detailed analytic calculations show that silicon core-exciton shell nanoparticles are characterized by a richness modes, which can be tuned through nanoparticle dimensions to produce large anticrossings visible near infrared, comparable those obtained plexcitonics. The complex...

Abstract A quantitative understanding of the electromagnetic response materials is essential for precise engineering maximal, versatile, and controllable light–matter interactions. Material surfaces, in particular, are prominent platforms enhancing interactions tailoring chemical processes. However, at deep nanoscale, electron systems significantly impacted by quantum surface-response material interfaces, which challenging to probe using standard optical techniques. Here, we show how...

Surface-response functions are one of the most promising routes for bridging gap between fully quantum-mechanical calculations and phenomenological models in quantum nanoplasmonics. Within all currently available recipes obtaining such response functions, \emph{ab initio} remain predominant, wherein surface-response function retrieved via metal's non-equilibrium to an external perturbation. Here, we present a complementary approach where appealing namely Feibelman $d$-parameters, yield...

The interaction between free electrons and optical fields constitutes a unique platform to investigate ultrafast processes in matter explore fundamental quantum phenomena. Specifically, optically modulated electron microscopy act as noninvasive probes that push space-time-energy resolution the picometer-attosecond-microelectronvolt range. Electron energies well above involved photon are commonly used, rendering low electron-light coupling and, thus, only providing limited access wealth of...

Engineering light–matter interactions up to the strong-coupling regime at room temperature is one of cornerstones modern nanophotonics. Achieving this goal could enable new platforms for potential applications such as quantum information processing, light sources, and even metrology. Layered materials like transition metal dichalcogenides (TMDCs) and, in particular, tungsten disulfide (WS2), possess strong dipole moments which are comparable semiconductor-based dots, but former also exhibit...

Recent experiments have shown that the plasmonic assisted internal photoemission from a metal to silicon can be significantly enhanced by introducing monolayer of graphene between two media. This is despite limited absorption in undoped (∼πα=2.3%). Here we propose physical model where surface plasmon polaritons enhance single-layer enhancing field along interface. The relatively long relaxation time allows for multiple attempts carrier overcome Schottky barrier and penetrate into...

Optically trapped Rydberg atoms are a suitable platform to explore quantum many-body physics mediated by long-range atom–atom interactions that can be engineered through externally applied light fields. However, this approach is limited dipole-allowed transitions and spatial resolution of the order optical wavelength. Here, we theoretically investigate interaction between free electrons individual as an induce nondipolar with subnanometer precision substantial degree control over final...

A rigorous account of quantum nonlocal effects is paramount for understanding the optical response metal nanostructures and designing plasmonic devices at nanoscale. Here, we present a scheme retrieving surface metals, encapsulated in Feibelman d-parameters, from electron energy-loss spectroscopy (EELS) cathodoluminescence (CL) measurements. We theoretically demonstrate that have dramatic impact on EELS CL spectra, guise spectral shifts damping, when either system size or inverse wave vector...

We study electromagnetic scattering and subsequent plasmonic excitations in periodic grids of graphene ribbons. To address this problem, we develop an analytical method to describe the plasmon-assisted absorption radiation by a structure ribbons forming diffraction grating for THz mid-IR light. The major advantage lies its ability accurately excitation surface plasmons (GSPs) one-dimensional (1D) gratings without use both time-consuming, computationally demanding full-wave numerical...

Significance Superconductivity and plasmonics constitute two extremely vibrant research topics, although with often nonoverlapping communities. Here, we bridge these active fields by showing that graphene plasmons’ unprecedented light localization into nanometric scales can be exploited to probe the electrodynamics (including collective excitations) of superconductors. Our findings are important both from a fundamental standpoint, representing paradigm shift (i.e., probing Higgs modes...

Plasmon coupling and hybridization in complex nanostructures constitutes a fertile playground for controlling light at the nanoscale. Here, we present semi-analytical model to describe emergence of hybrid plasmon modes guided along 2D nano-slits. In particular, find two new coupled plasmonic resonances arising from symmetric antisymmetric hybridizations edge plasmons constituent half-sheets. These give rise an antibonding bonding mode, lying above below energy bare plasmon. Our treatment is...

The ability to effectively guide electromagnetic radiation below the diffraction limit is of utmost importance in prospect all-optical plasmonic circuitry. Here, we propose an alternative solution conventional metal-based plasmonics by exploiting deep subwavelength confinement and tunability graphene plasmons guided along apex a graphene-covered dielectric wedge or groove. In particular, present quasi-analytic model describe eigenmodes such system, including complete determination their...

We discuss the scattering of graphene surface plasmon polaritons (SPPs) at an interface between two semi-infinite sheets with different doping levels and/or underlying dielectric substrates. take into account retardation effects and emission free radiation in process. derive approximate analytic expressions for reflection transmission coefficients SPPs as well same quantities emitted radiation. show that problem can be recast a Fredholm equation second kind. Such then solved by series...