Hollow core fibre for THz applications

This work is focused on the analysis of hollow core photonic band gap fibres (HC-PBGFs) for THz applications. Waveguide design in this spectral region is a major challenge due to the high conductivity losses of metals and high absorption of the dielectrics. HC-PBGFs are dielectric waveguides in which the power fraction propagating in the dielectric is very low, and losses due to material absorption are dramatically reduced. HC-PBGFs have been proposed and developed from the end of 90´s for applications in visible and near infrared (NIR) spectrum, and in few years propagation losses have been dramatically reduced from tens of dB/m to few dB/Km.