A Novel Ultra-Low Loss Rectangle-Based Porous-Core PCF for Efficient THz Waveguidance: Design and Numerical Analysis.

Abdullah Al-Mamun Bulbul,Farjana Imam,M A Parvez Mahmud,Md Abdul Awal

doi:10.3390/s20226500

Abstract

A novel, rectangle-based, porous-core photonic crystal fiber (PCF) has been modeled for the efficient propagation of a THz wave. The performance of the anticipated model has been assessed using the finite element method (FEM) in the range of 0.5–1.5 THz. Both the fiber core and cladding are modeled with rectangular air holes. Numerical analysis for this model reveals that the model has a lower amount of dispersion of about 0.3251 ps/THz/cm at 1.3 THz. Compared to the other THz waveguides, the model offers an ultra-lower effective material loss of 0.0039 cm−1 at the same frequency. The confinement loss is also lower for this model. Moreover, this model has a high-power fraction of about 64.90% at the core in the x-polarization mode. However, the effective area, birefringence, and numerical aperture have also been evaluated for this model. Maintenance of standard values for all the optical parameters suggests that the proposed PCF can efficiently be applied in multichannel communication and several domains of the THz technology.

Highlights

In the past few years, the terahertz (THz) wave radiation, which is known as submillimeter-wave, has been potentially exercised in different applications like biosensing [1], medical imaging [2], astronomy [3], security [4], and communication [5,6]
THz radiation cannot go through metal or water, and it faces difficulty when it passes through fog and clouds
Several types of the waveguide have been designed, such as metal wires [9], plastic fiber [10], dielectric tubes [11], hollow-core fiber [12], polymer Bragg fiber [13], and solid core fiber [14] for instance, the circular rod waveguide [15,16]. These waveguides suffer from numerous limitations, e.g., high material loss, higher bending loss, higher dispersion, and higher atmospheric loss

Summary

Introduction

In the past few years, the terahertz (THz) wave radiation, which is known as submillimeter-wave, has been potentially exercised in different applications like biosensing [1], medical imaging [2], astronomy [3], security [4], and communication [5,6]. As the THz source is commercially available an efficient, low loss, and dispersion free THz waveguide is a burning need for the proper guidance of this wave To realize these prerequisites, several types of the waveguide have been designed, such as metal wires [9], plastic fiber [10], dielectric tubes [11], hollow-core fiber [12], polymer Bragg fiber [13], and solid core fiber [14] for instance, the circular rod waveguide [15,16]. These waveguides suffer from numerous limitations, e.g., high material loss, higher bending loss, higher dispersion, and higher atmospheric loss

Methods

Results

Conclusion