Terahertz relativistic spatial solitons in doped graphene metamaterials

@article{Dong2011TerahertzRS,
  title={Terahertz relativistic spatial solitons in doped graphene metamaterials},
  author={Haiming Dong and Claudio Conti and Fabio Biancalana},
  journal={Journal of Physics B},
  year={2011},
  volume={46},
  pages={155401}
}
We propose an electrically tunable graphene-based metamaterial that shows a large nonlinear optical response at THz frequencies. The responsible nonlinearity comes from the intraband current, which we are able to calculate analytically. We demonstrate that the proposed metamaterial supports stable 2D spatial solitary waves. Our theoretical approach is not restricted to graphene, but can be applied to all materials exhibiting a conical dispersion supporting massless Dirac fermions. 

Figures from this paper

Nonlinear reshaping of terahertz pulses with graphene metamaterials
We study the propagation of electromagnetic waves through a slab of graphene metamaterial composed of the layers of graphene separated by dielectric slabs. Starting from the kinetic expression forExpand
Tunable terahertz optical properties of graphene in dc electric fields
Abstract We develop a simple theoretical approach to investigate terahertz (THz) optical properties of monolayer graphene in the presence of an external dc electric field. The analytical results forExpand
Enhanced Kerr nonlinearity in a quantized four-level graphene nanostructure
In this paper, a new model is proposed for manipulating the Kerr nonlinearity of right-hand circular probe light in a monolayer of graphene nanostructure. By using the density matrix equations andExpand
Electron beams in 2D inhomogeneous graphene and nonlinear electrodynamics properties of graphene-dielectric multilayered metamaterials
We develop farther our “three-level” approach to graphene metamaterials including “metamaterial treatment” of 2D beams of electron (BE) in graphene with 2D inhomogeneous and nonlinear electromagneticExpand
Formation of infrared solitons in graphene ensemble under Raman excitation
The formation of infrared solitons in graphene under Raman excitation is investigated using density-matrix approach. We find that the unique band structure and selection rules for the opticalExpand
Nonlinear switching of terahertz pulses in the structures with graphene layers
Starting from the kinetic expression of 2D nonlinear electric current in the graphene, the new equation is derived, to simulate nonlinear THz electromagnetic wave propagation through layered grapheneExpand
Graphene induced mode bifurcation at low input power
Abstract We study analytically the plasmonic modes in the graphene-coated dielectric nanowire, based on the explicit form of nonlinear surface conductivity of graphene. The propagation constants ofExpand
Nonlinear spatiotemporal focusing of terahertz pulses in the structures with graphene layers
The nonlinear interaction of transversely bounded terahertz pulses with layered structures that include graphene layers is investigated theoretically. The nonlinearity possesses the focusingExpand
High-efficiency infrared four-wave mixing signal in monolayer graphene
A scheme of enhanced four-wave mixing (FWM) signal is exploited in graphene under an external magnetic field via multiphoton quantum destructive interference. By solving the coupledExpand
Formation and ultraslow propagation of infrared solitons in graphene under an external magnetic field
Unusual dispersion relation of graphene nanoribbons for electrons can lead to an exceptionally strong optical response in the infrared regime and exhibits a very good tunable frequency. According toExpand
...
1
2
3
4
...

References

SHOWING 1-10 OF 40 REFERENCES
Strong nonlinear optical response of graphene in the terahertz regime
We demonstrate that within the model of massless Dirac fermions, graphene has a strong nonlinear optical response in the terahertz regime. It is found that the nonlinear contribution significantlyExpand
Ultrafast opto-terahertz photonic crystal modulator.
TLDR
An agile optically controlled switch or modulator of terahertz (THz) radiation based on a one-dimensional photonic crystal with a GaAs wafer inserted in the middle as a defect layer is presented. Expand
Coherent nonlinear optical response of graphene.
We investigate the nonlinear optical properties of graphene flakes using four-wave mixing. The corresponding third-order optical susceptibility is found to be remarkably large and only weaklyExpand
Coherent control of ballistic photocurrents in multilayer epitaxial graphene using quantum interference.
TLDR
All optical injection of current provides not only a noncontact way of injecting directional current in graphene but also new insight into optical and transport process in epitaxial graphene. Expand
Wigner model for quantum transport in graphene
The single graphene layer is a novel material consisting of a flat monolayer of carbon atoms packed in a two-dimensional honeycomb lattice, in which the electron dynamics is governed by the DiracExpand
Nonlinear optical response of graphene in time domain
We study nonlinear optical response of electron dynamics in graphene to an intense light pulse within the model of massless Dirac fermions. The time-dependent Dirac equation can be cast into aExpand
The Physics of ultrafast saturable absorption in graphene.
TLDR
The results strongly suggest that graphene is an excellent atomic layer saturable absorber, far beyond the time resolution of other ultrafast techniques with hundred fs laser pulses. Expand
Modulational instability and solitons in excitonic semiconductor waveguides
Nonlinear light propagation in a single-mode micron-size waveguide made of semiconducting excitonic material has been theoretically studied in terms of exciton-polaritons by using an analysis basedExpand
Nonlinear electromagnetic response of graphene: frequency multiplication and the self-consistent-field effects.
  • S. Mikhailov, K. Ziegler
  • Physics, Medicine
  • Journal of physics. Condensed matter : an Institute of Physics journal
  • 2008
TLDR
A quasi-classical kinetic theory of the nonlinear electromagnetic response of graphene, taking into account the self-consistent-field effects is developed, and possible applications of graphene in terahertz electronics are discussed. Expand
Broadband graphene polarizer
Scientists study the coupling, guiding and polarizing of electromagnetic waves in graphene and demonstrate a graphene-based fibre polarizer that exhibits a transverse-electric-pass polarization at anExpand
...
1
2
3
4
...