Generation of ultra-wideband achromatic Airy plasmons on a graphene surface

Abstract

Tunable ultra-wideband achromatic plasmonic Airy beams are demonstrated on graphene surfaces. Surface plasmonic polaritons are excited using diffractive gratings. The phase and amplitude of plasmonic waves on the graphene surface are determined by the relative position between the grating arrays and the duty ratio of the grating unit cell, respectively. The transverse acceleration and nondiffraction properties of plasmonic waves are observed. The achromatic Airy plasmons with identical acceleration trajectory at different excited frequencies can be achieved by tuning dynamically the Fermi energy of graphene without reoptimizing the grating structures. The proposed devices may find applications in photonics integrations and surface optical manipulation.

Photonic Hook Plasmons: A New Curved Surface Wave

“…Realization of plasmonic Mathieu and Weber beams were also reported . However, in low‐dimensional systems, such as plasmonic or graphene, in which at least in one of the three dimensions electronic state wave function is confined, today the families of plasmon Airy beams are the only beams that have a curved trajectory. But for Airy‐type SPPs, high‐beam acceleration is required to achieve significant curvature over the propagation length.…”

Reflection Characteristics of Airy Beams Impinging on Graphene-Substrate Surfaces

“…Compared to the case of conventional air-glass interface, graphene-substrate surface may reveal many other important and interesting features of the airy beams upon reflection, which will pave the way to many unprecedented applications, such as nanoparticles trapping or manipulation and design of new integrated devices. Recently, the reflection of airy beams impinging on graphene-based structures has been demonstrated [21,[33][34][35]. Yang et al first studied the deflection and propagation distance of airy beams reflected by a single graphene sheet with different external biased voltage [33].…”

“…Yang et al first studied the deflection and propagation distance of airy beams reflected by a single graphene sheet with different external biased voltage [33]. Guan et al further reported the generation of achromatic airy plasmons on graphene surfaces in the infrared range [34]. Later, Imran et al investigated the propagation lengths and transverse displacements of airy beams in bilayer graphene with tunable surface conductivity [35].…”

Broadband Generation of Airy Beams with Hyperbolic Metamaterials

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the generation of Airy beams, it is highly desirable to locally control the amplitude and phase of the output beam simultaneously so as to satisfy the polynary amplitude and binary phase distributions. [15][16][17] Inspired by the flexibility of introducing complex field distributions, [18] various Airy beam generators, either for free-space light, [19][20][21][22][23][24][25] or surface plasmons, [20,[26][27][28][29][30] have been proposed and demonstrated based on metasurfaces. Recent studies have demonstrated that, manipulating the amplitude and phase simultaneously and independently leads to new wavefront manipulation effects and applications.

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“…Recent studies have demonstrated that, manipulating the amplitude and phase simultaneously and independently leads to new wavefront manipulation effects and applications. [15][16][17] Inspired by the flexibility of introducing complex field distributions, [18] various Airy beam generators, either for free-space light, [19][20][21][22][23][24][25] or surface plasmons, [20,[26][27][28][29][30] have been proposed and demonstrated based on metasurfaces. Different from the metasurface lenses or holograms that merely require phase modulation, controlling both the amplitude and phase simultaneously is highly required to generate high-quality Airy beams that are capable of keeping good nondiffracting nature and stable full width half-maximum (FWHM) during propagation.…”