Research Article published by Elsevier
In this paper, we present a porous-core circular photonic crystal fiber (PC-CPCF) with ultra-low material
loss for efficient terahertz wave transmission. The full vector finite element method with an ideally
matched layer boundary condition is used to characterize the wave guiding properties of the proposed
fiber. At an operating frequency of 1 THz, simulated results exhibit an extremely low effective material
loss of 0.043 cm 1, higher core power fraction of 47% and ultra-flattened dispersion variation of
0.09 ps/THz/cm. The effects of important design properties such as single mode operation, confinement
loss and effective area of the fiber are investigated in the terahertz regime. Moreover, the proposed fiber
can be fabricated using the capillary stacking or sol-gel technique and be useful for long distance transmission
of terahertz waves.