Hollow Core Inhibited Coupled Antiresonant Terahertz Fiber: A Numerical and Experimental Study
Jakeya Sultana, Md. Saiful Islam, Cristiano M. B. Cordeiro, Md. Selim Habib, Alex Dinovitser, Mayank Kaushik, Brian W.‐H. Ng, Heike Ebendorff‐Heidepriem, Derek Abbott
Abstract
In this article, a hollow core antiresonant photonic crystal fiber is analyzed for terahertz applications. A numerical analysis of the proposed fiber is first carried out to minimize coupling between the core and cladding modes. The modeling of the scaled-up and inhibited coupling fiber is carried out by means of a finite element method, which is then demonstrated using a Zeonex filament fiber, fabricated by fused deposition modeling of 3-D printing technology. The simulation is carried out to analyze both the transmission and possibility of refractometric sensing, whereas the experimental analysis is carried out using terahertz time-domain spectroscopy, and supports our numerical findings, illustrating how the proposed fibers can be used for low-loss transmission of terahertz waves. The simplicity of the proposed fiber structures facilitates fabrication for a number of different transmission and sensing applications in the terahertz range.