Graphene plasmons in the presence of adatoms
Journal article, 2017

We theoretically investigate graphene plasmons in the presence of a low density of adatoms on the graphene surface. The adatoms can significantly modify the conductivity and plasmonic properties of graphene and may produce a level splitting with the plasmon mode, resulting in two plasmon branches. The high energy branch exhibits large losses and the low energy branch exhibits low losses. Our model may also be considered as a simple model for molecules on graphene and we show that graphene plasmons are sensitive to such changes in the environment. Our microscopic treatment of plasmons and adatoms shows the sensitivity of plasmons and highlights the potential of graphene plasmons for sensing purposes.

terahertz

antennas

conductivity

meta-materials

molecules

Author

Giovanni Viola

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

Tobias Wenger

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

Jari Kinaret

Chalmers, Physics, Condensed Matter Theory

Mikael Fogelström

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

New Journal of Physics

1367-2630 (ISSN)

Vol. 19 7 Article no 073027 - 073027

Subject Categories

Nano Technology

Condensed Matter Physics

DOI

10.1088/1367-2630/aa7811

More information

Created

10/7/2017