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- Non-Reciprocal, Robust Surface Plasmon Polaritons on Gyrotropic Interfaces doi link

Auteur(s): Pakniyat Samanech, Holmes Alexander, Hanson George w., Hassani gangaraj S. ali, Antezza M., Silveirinha Mario, Jam Shahrokh, Monticone Francesco

(Article) Publié: Ieee Transactions On Antennas And Propagation, vol. 65 p.3718 (2020)
Texte intégral en Openaccess : arxiv


Ref HAL: hal-02566076_v1
DOI: 10.1109/TAP.2020.2969725
Exporter : BibTex | endNote
Résumé:

Unidirectional surface plasmon polaritons (SPPs) at the interface between a gyrotropic medium and a simple medium are studied in a newly recognized frequency regime wherein the SPPs form narrow, beam-like patterns due to quasi-hyperbolic dispersion. The SPP beams are steerable by controlling parameters such as the cyclotron frequency (external magnetic bias) or the frequency of operation. The bulk band structure along different propagation directions is examined to ascertain a common bulk bandgap, valid for all propagation directions, which the SPPs cross. In addition, group velocity and Poynting vector for the SPPs are presented. The case of a finite-thickness gyrotropic slab is also considered, for which we present the Green function and examine the thickness and loss level required to maintain a unidirectional SPP.