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.

Details

Title
Strongly direction-dependent magnetoplasmons in mixed Faraday–Voigt configurations
Author
Moradi Afshin 1 ; Wubs Martijn 2 

 Kermanshah University of Technology, Department of Engineering Physics, Kermanshah, Iran (GRID:grid.459724.9) 
 Technical University of Denmark, Department of Photonics Engineering, Kgs. Lyngby, Denmark (GRID:grid.5170.3) (ISNI:0000 0001 2181 8870); Technical University of Denmark, Center for Nanostructured Graphene, Kgs. Lyngby, Denmark (GRID:grid.5170.3) (ISNI:0000 0001 2181 8870); Technical University of Denmark, NanoPhoton-Center for Nanophotonics, Kgs. Lyngby, Denmark (GRID:grid.5170.3) (ISNI:0000 0001 2181 8870) 
Publication year
2021
Publication date
2021
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2572729106
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.