AUTHOR=Zhang Yani , Jing Xin , Qiao Dun , Xue Lu 

TITLE=Rectangular Porous-Core Photonic-Crystal Fiber With Ultra-Low Flattened Dispersion and High Birefringence for Terahertz Transmission

JOURNAL=Frontiers in Physics

VOLUME=Volume 8 - 2020

YEAR=2020

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2020.00370

DOI=10.3389/fphy.2020.00370

ISSN=2296-424X

ABSTRACT=We propose a novel porous-core photonic crystal fiber (PCF) consisting of an asymmetric rectangular air-holes in core and six-ring hexagonal lattice circular air-holes in the cladding for achieving low loss polarization terahertz transmission in wide frequency range. By assuming TOPAS as the host material, finite element mothed (FEM) is used to investigate its properties. The near-zero flattened dispersion of -0.01±0.02 ps/THz/cm is achieved over a frequency range of 1.0-2.0 THz, as well as a high birefringence of 7.1×10-2 which can be useful for polarization maintaining applications. Also, critical parameters such as modal field distribution, effective modal loss, confinement loss, effective mode area, are discussed in detail. Further, fabrication possibilities are discussed briefly by comparing recent work on similar waveguide structures.