A SLOW-LIGHT GENERATING OPTICAL DEVICE AND A METHOD OF PRODUCING SLOW LIGHT WITH LOW LOSSES

摘要

A slow-light generating optical device (1) is disclosed. The optical device comprises a planar waveguide (2), and the planar waveguide comprises: a longitudinal extending guiding region (4) with a first side (6) and a second side (8), a first nanostructure (7) arranged on the first side (6) of the guiding region (4), and a second nanostructure (9) arranged on the second side (7) of the guiding region (4). The planar waveguide (2) includes a first longitudinal region where the first nanostructure (7) and the second structure (9) are arranged substantially glide-plane symmetric about the guiding region (4) of the planar waveguide, and the first and the second nanostructures (7, 9) are designed so that the planar waveguide has a band structure and is adapted to guide a forward propagating mode and a backward propagating mode possessing energy bands, which individually are non-degenerate and mutually degenerate, and which intersect each other and form a Dirac point at a Brillouin zone edge.