Angular-momentum-selective nanofocusing with Weyl semimetals
We investigate the theory of surface plasmon polaritons on a magnetic Weyl semimetal conical tip. We show that the axion term in the effective electrodynamics modifies the surface plasmon polariton dispersion relation and allows all modes with a given sign of the orbital angular momentum to be focused at the end of the tip. This is in contrast with normal metals, in which only one mode can reach the end. We discuss how this orbital angular momentum nanofocusing expands the potential of technologies that use this degree of freedom.
Authors
- Reinhold Egger (ORCID: https://orcid.org/0000-0001-5451-1883)
- Francesco Buccheri (ORCID: https://orcid.org/0000-0002-9315-6199)
- Alessandro De Martino (ORCID: https://orcid.org/0000-0002-3656-0419)
- Marco Peluso (ORCID: https://orcid.org/0009-0009-3314-9040)
Institutions
- Northampton Community College (US)
- St George's, University of London (GB)
- Politecnico di Torino (IT)
- City, University of London (GB)
- Istituto Nazionale di Fisica Nucleare, Sezione di Torino (IT)
- City St George's, University of London (GB)
- Heinrich Heine University Düsseldorf (DE)
Publication Details
- Journal
- Physical Review Research
- Published
- 2025-10-02
- DOI
- https://doi.org/10.1103/8c99-rvmm
- Primary Topic
- Orbital Angular Momentum in Optics
- Type
- article
- Field-Weighted Citation Impact
- 0.00