The anisotropic plasmons properties of black phosphorus allow for realizing direction-dependent plasmonics devices. Here, we theoretically investigated the hybridization between graphene surface (GSP) and localized (BPLSP) in strong coupling regime. By dynamically adjusting Fermi level graphene, show that coherent GSP-BPLSP can be achieved both armchair zigzag directions, which is attributed to with different in-plane effective electron masses along two crystal axes. quantitatively described...

Abstract Graphene plasmons with tightly confined fields and actively tunable resonant frequencies enable the selective detection of molecular vibrational fingerprints ultrahigh sensitivity, significantly promoting development surface‐enhanced infrared absorption spectroscopies (SEIRAS). However, current experimentally obtained enhancements are much smaller than theoretical prediction due to extremely low graphene plasmonic mode energy. In this paper, strategies improve energy theoretically...

Dynamical tunable plasmon-induced transparency (PIT) possesses the unique characteristics of controlling light propagation states, which promises numerous potential applications in efficient optical signal processing chips and nonlinear devices. However, previously reported configurations are sensitive to polarization can merely operate under specific single polarization. In this work we propose an anisotropic PIT metamaterial device based on a graphene-black phosphorus (G-BP)...

We investigate experimentally the parameter space defining, in visible range, far-field diffraction properties of a single circular subwavelength aperture surrounded by periodic grooves milled on metallic film. Diffraction patterns emerging from such an antenna are recorded under parallel- and perpendicular-polarized illumination at given wavelength. By monitoring directivity gain with respect to aperture, we point out role played near-field surface plasmon excitations. The results can be...

Magnetic plasmons (MPs) refer to the coupling of external electromagnetic waves with a strong magnetic response induced inside nanostructures. MPs have been widely employed as artificial atoms fabricate negative-permeability or negative-refractive-index metamaterials peculiar properties. Here, we propose refractive index sensing by utilizing MP resonances excited in simple one-dimensional (1D) metallic nanogroove array. We demonstrate sensitivity up 1200 nm/RIU figure merit (FOM*) 15 thanks...

Abstract A strategy is proposed to achieve wideband tunable perfect plasmonic absorption in graphene nanoribbons by employing attenuated total refraction (ATR) Otto prism configuration. In this configuration, the with a deep-subwavelength dielectric spacer used generate tunneling evanescent waves excite localized plasmons nanoribbons. The influence of configuration parameters on spectra studied systematically, and key finding that can be achieved actively controlling incident angle light...

Abstract The unintentional Fe incorporation in the homo-epitaxy of GaN on Fe-doped freestanding substrate is harmful to performance HEMT device, but mechanism unclear. memory effect, diffusion from epilayer, thermal decomposition N-face and Ga-face are all considered find origin. during heating process before growth regarded as main reason responsible for doping according TOF-SIMS, VPD-ICPMS, D-SIMS measurement results. MBE epilayer at lower temperature could effectively suppress doping.

In this paper, we generalize and improve the derivation of photoionization rate formula for one-electron atoms proposed by Keldysh [Zh. Eksp. Teor. Fiz. 47, 1945 (1964) [Sov. Phys. JETP 20, 1307 (1965)]]. More exact expressions in tunneling regime have been obtained. addition, extend to rates randomly oriented diatomic molecules.

We investigate both experimentally and theoretically the far-field diffraction patterns of single circular apertures as a function their diameters d at given illumination wavelength λ. observe transition between well-known pseudoscalar regime large holes (d≫λ) less-known vectorial subwavelength ones (d≪λ). Four different regimes are identified for d/λ regions, each one with its polarization dependence. A thorough comparison theoretical model, which takes into account finite hole size...

Strong light-matter interaction realized by an individual nanoparticle with large coupling energy has attracted much interest due to its great importance in both fundamental quantum science research and potential applications information devices. We theoretically investigate the strong between a plasmon-induced magnetic resonance supported single nanorod excitons two-dimensional atomic crystal. demonstrate record of Rabi splitting over $220\phantom{\rule{0.16em}{0ex}}\mathrm{meV}$ at ambient...

In this paper we investigate the strong exciton-plasmon coupling in a hybrid system consisting of an atomic thick ${\mathrm{WS}}_{2}$ monolayer and gold nanogroove array. We theoretically identify coexistence two damping pathways: coherent pathway resulting from resonant dipole-dipole interaction coupling-induced incoherent due to spontaneous emissions photon by one subsystem its subsequent reabsorption other. show that interplay between both processes not only determines optical property...

We introduce zinc oxide (ZnO) functionalized porous gold nanoparticles that exhibit strong second harmonic (SH) emission due to an efficient coupling of localized surface plasmons ZnO excitons. The nanosponges are perforated with a random network 10 nm sized ligaments, localizing in high density hot spots. use broadband, few-cycle ultrafast laser probe coherent nonlinear from individual bare and ZnO-functionalized sponges. While the third spectrum hybrid particles redshifts respect sponges,...

Real-time and in situ detection of aqueous solution is essential for bioanalysis chemical reactions. However, it extremely challenging infrared microscopic measurement because the large background water absorption. Here, we proposed a wideband-tunable graphene plasmonic biosensor to detect biomolecules an environment, employing attenuated total reflection Otto prism configuration tightly confined plasmons nanoribbons. Benefiting from electric field enhancement, such able identify molecular...

Future quantum information devices will most likely rely on the realization of coherent light-matter interactions in strong coupling regime and maintaining coherence with minimized incoherent damping pathways. Here, utilizing film-coupled planar nanoparticle supporting unique plasmon-induced magnetic resonance (PIMR), we theoretically study a single nanocube to monolayer two-dimensional atomic crystal. We demonstrate that nanocube-based configuration flux passing through dielectric layer...

Porous nanosponges, percolated with a three-dimensional network of 10 nm sized ligaments, recently emerged as promising substrates for plasmon-enhanced spectroscopy and (photo)catalysis. Experimental theoretical work suggests surface plasmon localization in some hot-spot modes the physical origin their unusual optical properties, but so far existence such hot-spots has not been proven. Here we use scattering-type scanning near-field nanospectroscopy on individual gold nanosponges to reveal...

We employ a broadband Ti:sapphire femtosecond oscillator to simultaneously launch two localized surface plasmon modes in rectangular plasmonic nanoholes. The resonant frequencies of these match well with our laser spectrum. As result, the nanoholes do not only efficiently boost third harmonic radiation intensity, but also significantly broaden harmonic's bandwidth, producing nanoscale deep-ultraviolet light source range 240 300 nm. Due involvement modes, beam becomes elliptically polarized...

We experimentally investigate the interaction between hybrid-morphology gold optical antennas and a few-cycle Ti:sapphire laser up to ablative intensities, demonstrating rich nonlinear plasmonic effects promising applications in coherent frequency upconversion nanofabrication technology. The two-dimensional array of hybrid consists elliptical apertures combined with bowties its minor axis. resonance is red-shifted respect central thus mainly enhances third harmonic spectrum at long...

Abstract Recently, asymmetric plasmonic nanojunctions have shown promise as on‐chip electronic devices to convert femtosecond optical pulses current bursts, with a bandwidth of multi‐terahertz scale, although yet at low temperatures and pressures. Such nanoscale are great interest for novel ultrafast electronics opto‐electronic applications. Here, the device is operated in air room temperature, revealing mechanisms photoemission from nanojunctions, fundamental limitations on speed...

A graphene-assisted vertical multilayer structure is proposed for high performance surface-enhanced Raman scattering (SERS) and infrared absorption (SEIRA) spectroscopies on a single substrate, employing simultaneous localized surface plasmon in the visible region magnetic resonance mid-infrared region. Such consists of monolayer graphene sandwiched between Ag nanoparticles (NPs) metal-insulator-metal (MIM) microstructure, which can be easily fabricated by standard micromachining process....

Surface plasmon polaritons (SPPs) are short-lived evanescent waves that can confine light at the surface of metallic nanostructures and transport energy over mesoscopic distances. They may be used to generate process information encoded as optical signals realize nanometer-scale ultrafast all-optical circuitry. The propagation properties these SPPs defined by geometry composition nanostructure. Due their short, femtosecond lifetimes, it has so far proven difficult track this in time domain...

Motivated by the increasing interest in active control of optical response magnetic metamaterials, we theoretically demonstrate that monolayer graphene, even only a single atom thick, can provide an efficient modulation on plasmon (MP) resonance, including over 10 meV resonance shift and 25% absorption intensity. We show is distinctly different from graphene-induced change electrically excited surface resonances plasmonic systems. Our analysis based equivalent nanocircuit method reveals MP...

Combining graphene with plasmonic nanostructures has attracted great interest for enhancing graphene-light interactions. Here, we report an intensive experimental study on the strong interaction of plasmon-induced magnetic resonances, i.e., plasmon (MP) supported by simple one-dimensional (1D) metallic nanogroove arrays. We demonstrate that absorption graphene, which covers only 10% groove surface, is dramatically enhanced one order magnitude compared 2.3% light pristine monolayer. The...