Transformation Optics Using Graphene
@article{Vakil2011TransformationOU, title={Transformation Optics Using Graphene}, author={Ashka Vakil and Nader Engheta}, journal={Science}, year={2011}, volume={332}, pages={1291 - 1294} }
Simulations show that control of the conductivity of a region within a graphene sheet could guide optical waves. Metamaterials and transformation optics play substantial roles in various branches of optical science and engineering by providing schemes to tailor electromagnetic fields into desired spatial patterns. We report a theoretical study showing that by designing and manipulating spatially inhomogeneous, nonuniform conductivity patterns across a flake of graphene, one can have this…
2,211 Citations
Transformation optics using graphene: One-atom-thick optical devices based on graphene
- Physics
- 2012
Metamaterials and transformation optics have received considerable attention in the recent years, as they have found an immense role in many areas of optical science and engineering by offering…
Tunable beam manipulation via graphene
- Physics7'th International Symposium on Telecommunications (IST'2014)
- 2014
We discuss here the realization of electrically tunable beam focusing and splitting using a single graphene flake with operation in the terahertz regime. The required conductivity pattern along a…
Singular graphene metasurfaces
- PhysicsEPJ Applied Metamaterials
- 2019
The spatial tunability of the electron density in graphene enables the dynamic engineering of metasurfaces in the form of conductivity gratings, which can bridge the momentum gap between incident…
Interaction between graphene and metamaterials: split rings vs. wire pairs.
- PhysicsOptics express
- 2012
It is shown that the weak optical response of graphene can be modified dramatically by coupling to the strong resonant fields in metallic structures.
Electrically tunable graded index planar lens based on graphene
- Physics
- 2014
The realization of electrically tunable beam focusing using a properly designed conductivity pattern along a strip on a background single graphene flake with operation in the terahertz regime is…
Graphene on an optical waveguide: comparison of simulation approaches
- Physics
- 2020
Recently, unusual properties of novel two-dimensional materials like graphene have revolutionized many branches of science and technology. Adequate numerical simulations of photonic devices…
Terahertz hyperbolic metamaterials and nonlinear couplers in graphene
- Physics
- 2014
Graphene exhibits a wide range of unique electronic and optical properties.1 Previous research has shown that a specific type of localized wave, a surface plasmon polariton, can propagate along a…
Electromagnetic properties of graphene metasurfaces and applications
- Physics2013 7th European Conference on Antennas and Propagation (EuCAP)
- 2013
Periodic perturbation of natural materials to engineer their properties is a versatile technique to design novel devices in the field of electromagnetics. Graphene, the ultimate two dimensional…
Graphene-Based Tunable Metamaterial Filter in Infrared Region
- Physics
- 2016
Abstract The extremely demanding fabrication precision has been a main block for real application of nanoscale metamaterial. To overcome this, a graphene-based tunable filter has been theoretically…
Switching terahertz waves with gate-controlled active graphene metamaterials.
- PhysicsNature materials
- 2012
It is demonstrated that substantial gate-induced persistent switching and linear modulation of terahertz waves can be achieved in a two-dimensional metamaterial, into which an atomically thin, gated two- dimensional graphene layer is integrated.
References
SHOWING 1-10 OF 31 REFERENCES
Circuits with Light at Nanoscales: Optical Nanocircuits Inspired by Metamaterials
- PhysicsScience
- 2007
It is shown that the concept of metamaterial-inspired nanoelectronics (“metactronics”) can bring the tools and mathematical machinery of the circuit theory into optics, may link the fields of optics, electronics, plasmonics, and meetamaterials, and may provide road maps to future innovations in nanoscale optical devices, components, and more intricate nanoscales metammaterials.
Graphene in a photonic metamaterial.
- PhysicsOptics express
- 2010
A photonic metamaterial is demonstrated that shows extraordinary sensitivity to the presence of a single atomic layer of graphene on its surface at the resonance frequency linked to the Fano-type plasmonic mode supported by the periodic metallic nanostructure.
Guided plasmons in graphene p-n junctions.
- PhysicsPhysical review letters
- 2010
Graphene is a promising material for nanoplasmonics and its frequency, velocity, and direction of propagation of guided plasmon modes can be easily controlled by the external electric field.
Magneto-optical conductivity in graphene
- Physics
- 2006
Landau level quantization in graphene reflects the Dirac nature of its quasiparticles and has been found to exhibit an unusual integer quantum Hall effect. In particular, the lowest Landau level can…
Transformation optics for plasmonics.
- PhysicsNano letters
- 2010
The general methodology for the design of transformation optical devices for surface plasmons is described and three representative examples with different functionalities are analyzed: a beam shifter, a cylindrical cloak, and a ground-plane cloak.
Searching for better plasmonic materials
- Physics
- 2009
A comparative study of various materials including metals, metal alloys and heavily doped semiconductors is presented and an approach for realizing optimal plasmonic material properties for specific frequencies and applications is outlined.
Graphene Terahertz Plasmon Oscillators
- PhysicsIEEE Transactions on Nanotechnology
- 2008
In this paper we propose and discuss coherent terahertz sources based on charge density wave (plasmon) amplification in two-dimensional graphene. The coupling of the plasmons to interband…
Dyadic Green's functions and guided surface waves for a surface conductivity model of graphene
- Physics
- 2007
An exact solution is obtained for the electromagnetic field due to an electric current in the presence of a surface conductivity model of graphene. The graphene is represented by an infinitesimally…
Dirac charge dynamics in graphene by infrared spectroscopy
- Physics
- 2008
A remarkable manifestation of the quantum character of electrons in matter is offered by graphene, a single atomic layer of graphite. Unlike conventional solids where electrons are described with the…
Equivalent Left-Handed/Right-Handed Metamaterial's Circuit Model for the Massless Dirac Fermions With Negative Refraction
- PhysicsIEEE Journal of Selected Topics in Quantum Electronics
- 2010
A new circuit model for the graphene p-n junction (PNJ) is introduced, which is based on the model proposed by Cheianov , using equivalent quantum circuit elements. Our model is similar to the…