Figure 6

The streamlines of the transverse component of the Poynting vector (grey lines) and the zero lines \({\overrightarrow{P}}_{transv}=\{{P}_{x}=0;{P}_{y}=0\}\) (P_x = 0 (red lines), P_y = 0 (green lines)) for all solid band gap fibre with a cross section shown in Fig. 4 at a wavelength of λ = 1.5 µm. (We used COMSOL Multiphysics v.4.4. www.comsol.com. software to create the image).