Low-loss forward and backward surface plasmons in a semiconductor nanowire coated by helical graphene strips

Abstract

In the long-wavelength approximation, the effective conductivity tensor is introduced for graphene ribbons (strips) placed periodically at the interface between two media. The resulting conducting surface is considered as a coating for semiconductor nanowire. For the hybrid waves of such nanowire the dispersion equations are obtained in explicit form. Two types of surface plasmons are found to exist: (i) the modified surface plasmons, which originate from the ordinary surface plasmons of a graphene-coated semiconductor nanowire, and (ii) the spoof plasmons, which arise on the array of graphene ribbons and may possess forward-wave and backward-wave dispersion. It is revealed that the spoof surface plasmons are low-loss ones, and their frequencies, field-confinement and group velocities can be tuned widely by adjusting the coil angle and width of helical graphene strips.

arXiv comment8 pages, 8 figures

References in corpus (15)

• Mid-Infrared Plasmonic Biosensing with Graphene
• Graphene Plasmonics: Challenges and Opportunities
• Optical far-infrared properties of graphene monolayer and multilayers
• Simple and accurate analytical model of planar grids and high-impedance surfaces comprising metal strips or patches
• Crystallographic Etching of Few-Layer Graphene
• Surface plasmon enhanced absorption and suppressed transmission in periodic arrays of graphene ribbons
• Plasmons in graphene: Recent progress and applications
• Hybrid waves localized at hyperbolic metasurfaces
• Integral Equation Analysis of Plane Wave Scattering by Coplanar Graphene-Strip Gratings in the THz Range
• Chiral response of twisted bilayer graphene
• Manipulation of Giant Faraday Rotation in Graphene Metasurfaces
• Dispersion features of complex waves in a graphene-coated semiconductor nanowire
• Crossing and anti-crossing effects of polaritons in a magnetic-semiconductor superlattice influenced by an external magnetic field
• Trapped Rainbow Techniques for Spectroscopy on a Chip and Fluorescence Enhancement
• Topologically Induced Optical Activity in Graphene-Based Meta-Structures

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• Multiple invisibility regions induced by symmetry breaking in a trimer of subwavelength graphene-coated nanowires
• Dual-polarized all-angle cloaking of a dielectric nanowire by helical graphene ribbons