Patent ID: 11921322
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A waveguide for transmitting electromagnetic radiation, the waveguide comprising:
a core region,
a cladding region extending around the core region; and
a first layer of a material having a thickness of less than a skin depth of the material for electromagnetic radiation of a first wavelength;
wherein the first layer is configured with a periodic refractive index and positioned within the waveguide such that a first surface polariton wave is excited at an interface between the core region and cladding region when electromagnetic radiation of the first wavelength is transmitted through the core region; and
wherein a momentum of the first surface polarition wave ks,1 added with an additional momentum caused by the periodic refractive index is matched with a second momentum of the electromagnetic radiation of the first wavelength kc.