In this paper, we discuss the existence of an electromagnetic mode propagating in a thin dielectric film deposited on metallic at particular frequency such that permittivity vanishes. We remarkable properties terms extreme subwavelength confinment and its potential applications. also link between mode, IR absorption peak known as Berreman effect surface phonon polariton air/dielectric interface. Finally, establish connection with polarization shift occuring quantum wells.

The physics of the epsilon-near-zero (ENZ) mode, which is supported by a nanolayer at frequency where dielectric permittivity vanishes, has recently been subject debate. In this Rapid Communication, we thoroughly investigate and clarify providing its main characteristics domain existence. This understanding will benefit all applications that rely on ENZ modes in semiconductor nanolayers, including directional perfect absorption, voltage-tunable devices, ultrafast thermal emission.

Incandescent sources typically emit broadband light in all directions. Most of this radiation is lost for applications the infrared region, such as spectroscopy or compositional analysis. Here authors control both spatial and temporal coherence blackbody with a plasmonic metasurface that emits narrow band frequencies small solid angle. This system operates reliably at 600 \ifmmode^\circ\else\textdegree\fi{}C using CMOS-compatible materials, inviting development compact, efficient, cheap gas...

We present a new type of electrically tunable strong coupling between planar metamaterials and epsilon-near-zero modes that exist in doped semiconductor nanolayer. The use semiconductors makes this over wide range wavelengths through the different doping densities. also modulate by depleting layer electrically. Our hybrid approach incorporates optical interactions into highly tunable, integrated device platform.

We experimentally demonstrate the control of spontaneous emission rate and radiation pattern colloidal quantum dots deterministically positioned in a plasmonic patch antenna. The antenna consists thin gold microdisk separated from planar layer by few tens nanometers thick dielectric layer. emitters are shown to radiate through entire highly directional vertical pattern. Strong acceleration is observed, depending on geometry. Considering double dipole structure emitters, this corresponds...

Antennas are widely used by electrical engineers to enhance the coupling between propagating waves and electric sources or detectors. It is thus tempting develop an optical analog tailor visible light emission absorption atom a molecule. This idea has been put forward recently it demonstrated that both radiative rate pattern of emitters can be modified metallic nanostructures. In this Letter, we introduce concept impedance for nanoantenna two-level systems nanoparticles described dipole...

The emission of light by a material at temperature T has been shown recently to be coherent in the near field. These properties were attributed thermal excitation surface polaritons. We review origin this phenomenon. analyze influence microstructure and on coherence show how engineer thermoradiative surfaces. report design quasi-isotropic source very directional light. also measurement transverse length

Surface plasmons are usually described as surface waves with either a complex wave vector or frequency. When discussing their merits in terms of field confinement enhancement the local density states, controversies have arisen results depend on choice In particular, shape dispersion curves depends this choice. work, we derive two equivalent vectorial representations plasmon using an expansion over These can be used to discuss issue and states they nonambiguous relation relations. They also...

We report the design of a tungsten thermal source with extraordinarily high directivity in near infrared, comparable to CO2 laser. This is signature long-range correlation electromagnetic field plane. phenomenon due resonant excitation surface-plasmon polaritons.

The electromagnetic modes of a GaAs quantum well between two AlGaAs barriers are studied. At the longitudinal optical phonon frequency, system supports polariton mode confined in thickness that we call epsilon-near-zero mode. This can be resonantly excited through grating resulting very large absorption localized single well. We show reflectivity modulated by applying voltage. paves way to new class active optoelectronic devices working midinfrared and far infrared at ambient temperature.

Thermal emission can be conveniently described using Kirchhoff law which states that the emissivity is equal to absorptivity for isothermal bodies. For a finite size system, replaced by an absorption cross section. Here, we study link between thermal and object not isothermal. We define local rate given incident plane wave prove it rate. Hence, extended anisothermal media. A practical consequence possibility of analysing radiation variety non-equilibrium systems such as microwave in...

We introduce a quantization scheme that can be applied to surface waves propagating along plane interface. An important result is the derivation of energy wave for dispersive nonlossy media without invoking any specific model dielectric constant. Working in Coulomb's gauge, we use modal representation fields. Each mode associated with quantum harmonic oscillator. have formalism derive mechanically spontaneous emission rate plasmon by two-level system. The very good agreement Green's tensor...

Surface plasmon polaritons can be used to confine fields at the nanoscale and are now one of working horses nanophotonics. This perspective deals with recent studies aiming doing quantum optics experiments surface plasmons. A first class or two single plasmons aims observing wave-particle duality, squeezing, coalescence second cavity electrodynamics localized in both weak coupling regime strong regime.

Surface plasma waves are collective oscillations of electrons that propagate along a metal-dielectric interface. In the last ten years, several groups have reproduced fundamental quantum optics experiments with surface plasmons. Observation single-plasmon states, waveparticle duality, preservation entanglement photons in plasmon-assisted transmission, and more recently, two-plasmon interference been reported. While losses detrimental for observation squeezed they can be seen as new degree...

The thermal emission of cross-slit silicon carbide grating is studied in the Restrahlen region over all angles. We show experimentally that excitation surface-phonon polaritons on surface 2D allows us to get a high emissivity both polarizations, which collimated $p$ polarization for specific wavelength determined by periodicity grating. also numerically gratings optimized efficiently out-couple thermally excited flat part dispersion relation can have efficiency directions polarizations.

We demonstrate that it is possible to modulate the thermal emission through an electrical modulation of emissivity. The basic idea design a device where absorption due resonant phenomenon. If resonance can be electrically controlled, then and, therefore, controlled. this general concept using THz by surface phonon polaritons coupled gold grating. In our device, mostly mode confined in single quantum well (QW). emissivity controlled controlling refractive index gate voltage electron density....

Light emission by inelastic tunneling has been known for many years. Recently, this technique used to generate surface plasmons using a scanning microscope tip. The process suffers from very low efficiency lower than photon in 10^{4} electrons. We introduce resonant plasmonic nanoantenna that allows both enhancing the power conversion plasmon polaritons more 2 orders of magnitude and narrowing spectrum. physics is analyzed terms local density states radiate polaritons.

The development of novel thermal sources that control the emission spectrum and angular pattern is fundamental importance. In this paper, we investigate properties semiconductor hyperbolic metamaterials (SHMs). Our structure does not require use any periodic corrugation to provide monochromatic directional properties. We show these arise because epsilon-near-zero conditions in SHMs. dominated by effect doped quantum wells composing SHM. Furthermore, different are observed for s p...

Enhanced transmission and absorption by a silver film with periodic array of slits has been studied numerically. We find that peaks coincide can be attributed to resonances the structure. show these modes viewed as coupling between cavity surface plasmon polaritons. A quantitative analysis shows coupled mode have character or depending on distance crossing point their dispersion relation. Finally, we provide simple model for peak value introducing concept radiative yield.

It is known that the near-field spectrum of local density states electromagnetic field above a SiC/air interface displays an intense narrow peak due to presence surface polariton. has been recently shown this wave can be strongly coupled with sheet plasmon graphene in graphene-SiC heterosystems. Here, we explore interplay between these two phenomena and demonstrate systems presents peaks whose position depends dramatically both on distance chemical potential graphene. This paves way towards...

Surface plasmons polaritons are mixed electronic and electromagnetic waves. They have become a workhorse of nanophotonics because plasmonic modes can be confined in space at the nanometer scale time 10 fs scale. However, practice, often excited using diffraction-limited beams. In order to take full advantage their potential for sensing information technology, it is necessary develop microscale ultrafast electrical source surface plasmons. Here, we report design, fabrication characterization...