Current-controlled light scattering and asymmetric plasmon propagation in graphene
Journal article, 2018

We demonstrate that plasmons in graphene can be manipulated using a dc current. A source-drain current lifts the forward/backward degeneracy of the plasmons, creating two modes with different propagation properties parallel and antiparallel to the current. We show that the propagation length of the plasmon propagating parallel to the drift current is enhanced, while the propagation length for the antiparallel plasmon is suppressed. We also investigate the scattering of light off graphene due to the plasmons in a periodic dielectric environment and we find that the plasmon resonance separates in two peaks corresponding to the forward and backward plasmon modes. The narrower linewidth of the forward propagating plasmon may be of interest for refractive index sensing and the dc current control could be used for the modulation of mid-infrared electromagnetic radiation.

Author

Tobias Wenger

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Giovanni Viola

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Jari Kinaret

Chalmers, Physics, Condensed Matter Theory

Mikael Fogelström

Chalmers, Microtechnology and Nanoscience (MC2)

Philippe Tassin

Chalmers, Physics, Condensed Matter Theory

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 79 085419

Subject Categories

Inorganic Chemistry

Other Physics Topics

Condensed Matter Physics

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Materials Science

Roots

Basic sciences

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1103/PhysRevB.97.085419

More information

Latest update

3/28/2018