When investigating polaritons dispersion in a composite ferrite-semiconductor structure being under an action of a static magnetic field I have found two different types of the surface polaritons: those that merge into the bulk polariton region at a finite value of the wavevector k and the others which continue to the same magnetostatic limit with the bulk polaritons. Is there any (practical) importance in such surface polaritons dispersion features?
Article Dispersion regions overlapping for bulk and surface polarito...
Article Coexistence of bulk and surface polaritons in a magnetic-sem...
Like any resonances of different nature, they can interact with each other enhancing or reducing the interaction field, this process may be controlled by an external field, which is important when the density of the field change in the structure for various physical processes, and ultimately to create devices.
It would be strange to see a coupling between surface and bulk modes since the surface plasmon modes are inherently transverse while the bulk modes are longitudinal. Any system that could couple and hybridize these modes would be very interesting indeed.
For a planar surface, the coupling is indeed physically forbidden without additional effects (non-linearities, etc.).
For more complex shaped nano particles the discussion has been started already in [1], where the resonances of a thin spherical shell can be interpreted as bulk-polaritons.
[1]. K. Höflich, U. Gösele, and S. Christiansen, Phys. Rev. Lett. 103, 87404 (2009).
Article Comment on "Are Volume Plasmons Excitable by Classical Light?''
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Semiconductor