Current-controlled light scattering and asymmetric plasmon propagation in graphene
Artikel i vetenskaplig tidskrift, 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.

Författare

Tobias Wenger

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Giovanni Viola

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Jari Kinaret

Chalmers, Fysik, Kondenserade materiens teori

Mikael Fogelström

Chalmers, Mikroteknologi och nanovetenskap (MC2)

Philippe Tassin

Chalmers, Fysik, Kondenserade materiens teori

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 79 085419

Ämneskategorier

Oorganisk kemi

Annan fysik

Den kondenserade materiens fysik

Styrkeområden

Nanovetenskap och nanoteknik

Materialvetenskap

Fundament

Grundläggande vetenskaper

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1103/PhysRevB.97.085419

Mer information

Senast uppdaterat

2018-03-28