Abstract
It has been shown that in a graphene/insulator/metal structure, the plasmons acquire a linear dispersion whose sound velocity is very near the Fermi velocity in graphene. I show that a DC current causes a redshift of the acoustic plasmons travelling upstream of the direction in which electrons flow. As the redshift of the upstream branch causes acoustic plasmon to approach the particle-hole continuum, the spectral weight of this plasmon branch is substantially reduced, resulting in a near unidirectional plasmon.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 193-195 |
| Number of pages | 3 |
| Journal | International Conference on Metamaterials, Photonic Crystals and Plasmonics |
| State | Published - 2021 |
| Event | 11th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2021 - Warsaw, Poland Duration: Jul 20 2021 → Jul 23 2021 |
Bibliographical note
Publisher Copyright:© 2021 META Conference. All rights reserved.