Abstract
We propose the design of a novel porous-core honeycomb lattice photonic crystal fiber (PH-PCF) with extremely low loss and flattened dispersion for guiding terahertz (THz) wave. Finite element method is used to investigate in detail the properties of the designed waveguide. The single modeness, effective material loss (EML), confinement loss (L <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> ), effective modal area, bending loss, distribution of power in different regions, and the dispersion profile of the designed structure are systematically analyzed. Simulation results of the proposed PH-PCF confirm that the bulk material absorption loss of the host material Topas can be reduced by 88.87% using the proposed design. The obtained EML is as low as 0.02227 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> at operating frequency f = 1 THz and the dispersion is ±0.15 ps/THz/cm, flattened over a band of frequency as wide as 1.15 THz. Besides, the reported design also offers negligible L <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> and relatively smaller bending loss as compared with other contemporary studies.
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