Abstract
The electrostatic theory of surface magnetoplasmons on a semi-infinite magnetized electron gas is generalized to mixed Faraday–Voigt configurations. We analyze a mixed Faraday–Voigt type of electrostatic surface waves that is strongly direction-dependent, and may be realized on narrow-gap semiconductors in the THz regime. A general expression for the dispersion relation is presented, with its dependence on the magnitude and orientation of the applied magnetic field. Remarkably, the group velocity is always perpendicular to the phase velocity. Both velocity and energy relations of the found magnetoplasmons are discussed in detail. In the appropriate limits the known surface magnetoplasmons in the higher-symmetry Faraday and Voigt configurations are recovered.
| Original language | English |
|---|---|
| Article number | 18373 |
| Journal | Scientific Reports |
| Volume | 11 |
| Issue number | 1 |
| Number of pages | 11 |
| ISSN | 2045-2322 |
| DOIs | |
| Publication status | Published - 2021 |
Bibliographical note
Funding Information:M.W. acknowledges support by the Danish National Research Foundation through NanoPhoton—Center for Nanophotonics (grant number DNRF147) and Center for Nanostructured Graphene (grant number DNRF103), and from the Independent Research Fund Denmark—Natural Sciences (project no. 0135-004038).
Publisher Copyright:
© 2021, The Author(s).