Graphene plasmons in the presence of adatoms
Artikel i vetenskaplig tidskrift, 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

Författare

Giovanni Viola

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Tobias Wenger

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Jari Kinaret

Chalmers, Fysik, Kondenserade materiens teori

Mikael Fogelström

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

New Journal of Physics

1367-2630 (ISSN)

Vol. 19 Article no 073027 - 073027

Ämneskategorier

Nanoteknik

Den kondenserade materiens fysik

DOI

10.1088/1367-2630/aa7811