Tuning Infrared Plasmon Resonance of Black Phosphorene Nanoribbon with a Dielectric Interface

Abstract

We report on the tunable edge-plasmon-enhanced absorption of phosphorene nanoribbons supported on a dielectric substrate. Monolayer anisotropic black phosphorous (phosphorene) nanoribbons are explored for light trapping and absorption enhancement on different dielectric substrates. We show that these phosphorene ribbons support infrared surface plasmons with high spatial confinement. The peak position and bandwidth of the calculated phosphorene absorption spectra are tunable with low loss over a wide wavelength range via the surrounding dielectric environment of the periodic nanoribbons. Simulation results show strong edge plasmon modes and enhanced absorption as well as a red-shift of the peak resonance wavelength. The periodic Fabry-Perot grating model was used to analytically evaluate the absorption resonance arising from the edge of the ribbons for comparison with the simulation. The results show promise for the promotion of phosphorene plasmons for both fundamental studies and potential applications in the infrared spectral range.

The Optical Properties and Plasmonics of Anisotropic 2D Materials

“…Therefore, BP films are treated as a model system to host the anisotropic and hyperbolic 2D plasmons . Great theoretical and experimental efforts have been devoted to investigating the plasmons in this natural anisotropic material. Below, we discuss the theoretical studies on the plasmon dynamics of BP films and the experimental progress in detecting BP plasmons, as well as the potential applications of plasmons in anisotropic 2D materials.…”

“…In the past few years, tremendous attention has been given to graphene plasmons, with a remarkable manifestation of high tunability and low loss . Recently, a number of theoretical efforts have been devoted to studying the plasmonic properties of BP, where anisotropic plasmon dispersions occur due to its band anisotropy . Fascinatingly, the hyperbolic plasmon polaritons, whose iso‐frequency contour is a hyperbola, are predicted to naturally exist in BP films, which originate from the coupling between the intraband and interband optical conductivity .…”

Lifetime and nonlinearity of modulated surface plasmon for black phosphorus sensing application

“…35 The peak position and bandwidth of the phosphorene absorption spectra are tunable via the surrounding dielectric environment of the periodic nanoribbons. 36 In this paper, we numerically analyze the confined surface plasmon of the fundamental wave and the second harmonic wave in the nanostructured black phosphorus nanoflake, which forms a grating to enhance the light-matter interaction. Coupling of light from the normal direction with nanostructured black phosphorus requires an arbitrary grating coupler providing lateral photon momentum.…”

“…All simulations are carried out for photon energies of up to 0.7 eV, 12,17,18,36 the bandgap of BP. Within this energy window, the Drude model is sufficient to model the conductivity of the multilayer BP system.…”

“…Within this energy window, the Drude model is sufficient to model the conductivity of the multilayer BP system. The conductivity of few-layer black phosphorus is given as 7,[12][13][14][15]36…”