Hybrid porous-core microstructure terahertz fibre with ultra-low bending loss and low effective material loss.

A hybrid porous-core microstructure optical fibre (MOF) is proposed and its guiding properties are characterised for efficient terahertz wave guiding. A numerical investigation using the finite element method showed that a hybrid-core MOF consisted of a diamond-shaped cell and the circular arrangement of air holes exhibited an extremely low-bending loss of 5.24 × 10-13 cm-1 for a bending radius of...