Hybridized Radial and Edge Coupled 3D Plasmon Modes in Self‐Assembled Graphene Nanocylinders

Abstract

Current graphene‐based plasmonic devices are restricted to 2D patterns defined on planar substrates; thus, they suffer from spatially limited 2D plasmon fields. Here, 3D graphene forming freestanding nanocylinders realized by a plasma‐triggered self‐assembly process are introduced. The graphene‐based nanocylinders induce hybridized edge (in‐plane) and radial (out‐of‐plane) coupled 3D plasmon modes stemming from their curvature, resulting in a four orders of magnitude stronger field at the openings of the cylinders than in rectangular 2D graphene ribbons. For the characterization of the 3D plasmon modes, synchrotron nanospectroscopy measurements are performed, which provides the evidence of preservation of the hybridized 3D graphene plasmons in the high precision curved nanocylinders. The distinct 3D modes introduced in this paper, provide an insight into geometry‐dependent 3D coupled plasmon modes and their ability to achieve non‐surface‐limited (volumetric) field enhancements.

Threshold conditions for transversal modes of tunable plasmonic nanolasers shaped as single and twin graphene-covered circular quantum wires

“…The high cost of the relevant technologies calls for the reliable pre-modeling of the scattering, absorption and emission properties of such devices. Although most frequently graphene is attached to flat dielectric substrates, graphene-covered circular nanowires can be also manufactured; their optical properties have been studied both experimentally [13] and theoretically [14][15][16][17][18][19][20][21].…”

Eigenmodes of Circular Dielectric Micro-Cylinder Covered with Graphene

“…Therefore, they attract the efforts of researches who try to predict electromagnetic behavior of graphene scatterers of various shapes [7][8][9][10][11][12][13][14] including graphene-covered wires and particles [11,[12][13][14][15][16][17][18]. Moreover, as stated in [19], micro and nanotubes of graphene, wrapped around circular cylindrical rods of millimeter-scale length, are already fabricated and studied.…”

Scattering Characteristics of Periodic Finite Array with Graphene Patches on Cylindrical Surface

“…The graphene structures in the THz wave range are of interest in different potential applications like filtering and censoring. Due to graphene characteristics, such structures are tunable and some of them even have a practical realization as tunable graphene mid-IR biosensors [1] and nanotubes [2]. In [3] a microsized Graphene Helmholtz Resonator on a circular dielectric rod was studied.…”