title: Low-loss polarization-maintaining THz photonic crystal fiber with a triple-hole core.
abstract: In this paper, we report a novel low-loss and polarization-maintaining terahertz (THz) photonic crystal fiber with a triple-hole unit inside the core. The properties of birefringence, effective material loss, confinement loss, bending loss, power fraction, dispersion, and single-mode condition are analyzed in detail by using the finite element methods. Simulation results show that high birefringence at a level of 10-2can be achieved by simply reducing the diameter of one air hole of the triple-hole core. And low effective material loss down to 30% of its bulk material loss can be achieved in our interested band around 3 THz, due to the high core porosity of the designed triple-hole core. Moreover, this design dramatically facilitates the fabrication process, because of the typical hexagonal structure with all circular air holes and avoiding the troublesome multiple sub-wavelength air holes in the core area. The results reveal that this proposal has potential for efficient THz transmission and other functional applications.
authors.forename: Zhiqing
authors.initials: Z
authors.lastname: Wu
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zhou
authors.forename: Handing
authors.initials: H
authors.lastname: Xia
authors.forename: Zhaohua
authors.initials: Z
authors.lastname: Shi
authors.forename: Jin
authors.initials: J
authors.lastname: Huang
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Jiang
authors.forename: Weidong
authors.initials: W
authors.lastname: Wu