Architecture for electromagnetic waveguide

An electromagnetic waveguide configured to an inhibited coupling guidance, comprising:

• a hollow central core surrounded by a microstructured sheath formed by an assembly of elementary cells, the assembly of elementary cells comprising a first peripheral ring comprising a first series of elementary cells and a second concentric ring-comprising a second series of elementary cells, the first peripheral ring and the second concentric ring being two distinct zones, at least one intermediate element connecting at least one elementary cell of the first peripheral ring with at least one elementary cell of the second concentric ring, such that the at least one elementary cell of the first peripheral ring and the at least one elementary cell of the second concentric ring are connected by the at least one intermediate element only, the at least one intermediate element having a cross section having an area, wherein the area is less than or equal to 50% of a cross-sectional area of each of the at least two elementary cells that it connects, the at least one intermediate element having a refractive index less than or equal to a refractive index of each of the at least two elementary cells that it connects, the at least one intermediate element having a tubular structure comprising a wall surrounding a central zone.