Probing Graphene's Nonlocality with Singular Metasurfaces
arXiv:1908.09320 · doi:10.1515/nanoph-2019-0323
Abstract
Singular graphene metasurfaces, conductivity gratings realized by periodically suppressing the local doping level of a graphene sheet, have recently been proposed to efficiently harvest THz light and couple it to surface plasmons over broad absorption bands, achieving remarkably high field enhancement. However, the large momentum wavevectors thus attained are sensitive to the nonlocal behaviour of the underlying electron liquid. Here, we extend the theory of singular graphene metasurfaces to account for the full nonlocal optical response of graphene and discuss the resulting impact on the plasmon resonance spectrum. Finally, we propose a simple local analogue model that is able to reproduce the effect of nonlocality in local-response calculations by introducing a constant conductivity offset, which could prove a valuable tool in the modelling of more complex experimental graphene-based platforms.
8 pages, 5 figures
References in corpus (26)
- Graphene plasmonics
- Graphene Plasmonics for Terahertz to Mid-Infrared Applications
- Mid-Infrared Plasmonic Biosensing with Graphene
- Graphene field effect transistors as room-temperature Terahertz detectors
- Mid-infrared plasmons in scaled graphene nanostructures
- Generalized nonlocal optical response in nanoplasmonics
- Nonlocal optical response in metallic nanostructures
- Probing the Ultimate Plasmon Confinement Limits with a Van der Waals heterostructure
- Tuning quantum non-local effects in graphene plasmonics
- Tunable plasmons in ultrathin metal films
- An Introduction to Graphene Plasmonics
- Surface Plasmons and Nonlocality: a Simple Model
- Plasmon-Emitter Interactions at the Nanoscale
- Quantum corrections in nanoplasmonics: shape, scale, and material
- Plasmonics in Atomically-Thin Crystalline Silver Films
- Electrically controlled terahertz magneto-optical phenomena in continuous and patterned graphene
- Projected-Dipole Model for Quantum Plasmonics
- Broadband Tunable THz Absorption with Singular Graphene Metasurfaces
- Plasmon-enhanced generation of non-classical light
- Nonlocal response in plasmonic waveguiding with extreme light confinement
- Probing Nonlocal Effects in Metals with Graphene Plasmons
- Analytical solution for the diffraction of an electromagnetic wave by a graphene grating
- Graphene, plasmons and transformation optics
- A transformation optics approach to singular metasurfaces
- The Physics of Unbounded, Broadband Absorption/Gain Efficiency in Plasmonic Nanoparticles
- Nonlocal effects in singular plasmonic metasurfaces
Cited by in corpus (6)
- Roadmap on Nonlocality in Photonic Materials and Metamaterials
- Resonators with tailored optical path by cascaded-mode conversions
- Hybrid Graphene-Plasmon Gratings
- Non-local quantum effects in plasmons of graphene superlattices
- Nonlocal effects in plasmonic metasurfaces with almost touching surfaces
- Polaritons in two-dimensional parabolic waveguides