A Novel Hexahedron Photonic Crystal Fiber in Terahertz Propagation: Design and Analysis

Paul, Bikash Kumar; Haque, Md. Ashraful; Ahmed, Kawsar; Sen, Shuvo

doi:10.3390/photonics6010032

Cited by 43 publications

(17 citation statements)

References 21 publications

(35 reference statements)

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“…Numerical aperture is an important dimensionless PCF parameter that depends on the core‐cladding refractive index contrast, with PCF sensing application requiring a large numerical aperture. It is defined using the following expression [26]:

NA ≃ \frac{1}{\sqrt{1 + ((π A_{eff} f^{2}) / c^{2})}}

where

A_{eff}

, f and c denote effective area, operating frequency and speed of light in vacuum, respectively.…”

Section: Simulation Methods and Numerical Synopsismentioning

confidence: 99%

Modelling and simulation of novel liquid‐infiltrated PCF biosensor in Terahertz frequencies

Suhaimi

Yakasai

Abas

et al. 2020

IET Optoelectronics

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NA ≃ \frac{1}{\sqrt{1 + ((π A_{eff} f^{2}) / c^{2})}}

where

A_{eff}

, f and c denote effective area, operating frequency and speed of light in vacuum, respectively.…”

Section: Simulation Methods and Numerical Synopsismentioning

confidence: 99%

Modelling and simulation of novel liquid‐infiltrated PCF biosensor in Terahertz frequencies

Suhaimi

Yakasai

Abas

et al. 2020

IET Optoelectronics

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“…Since the material with the least opacity in THz frequencies is dry air, the geometry of the proposed fibre is designed such that majority of propagated power would transmit through the dry air holes in the core whilst at the same time preserving MTIR guidance. Power fraction, ´ gives insight into propagated power concentration across various regions of the fibre, which is helpful for designing PC-PCFs, and it can be expressed as [19,20]: (3) where x denotes the fibre region of interest. Besides the core air hole, power fractions in the cladding air holes and Topas material are also presented for convenience.…”

Section: Simulation Resultsmentioning

confidence: 99%

Design and simulation of rotated hexagonal porous core photonic crystal fibre with improved effective material loss and dispersion properties

Yakasai¹,

Abas²,

Shamsuddin³

et al. 2020

IJEECS

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A thorough modal characterization, centred on the full vectorial finite element method (FEM) has been used to model and numerically investigate a porous core photonic crystal fibre (PC-PCF), which may potentially be integrated into Terahertz (1012 Hz) compact systems. The proposed fibre consists of a rotated hexagonal core surrounded by a conventional hexagonal cladding. It has been shown that effective material loss (EML), core power fraction and dispersion profile are 0.019 cm-1, 51.7% and 0.5 ± 0.04 ps/THz/cm within 1 THz bandwidth, respectively. Based on simulated results and noncomplex design, it is envisaged that the proposed fibre can be realised for industrial THz applications.

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“…It determines the leakage of light while propagation and restricts the length of the fiber. Confinement loss can be determined by the imaginary part of the effective mode index as follows [20]:…”

Section: Modelling and Numerical Analysismentioning

confidence: 99%

Numerical Design and Investigation of Circularly Segmented Air Holes-Assisted Hollow-Core Terahertz Waveguide as Optical Chemical Sensor

et al. 2021

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In this paper, a polarization-maintaining single-mode rectangular-shaped hollow-core waveguide with four segmented air cladding in the terahertz (THz) regime is presented for detecting various toxic industrial chemicals. A new type of injection moldable cyclic olefin copolymer, commercially named as TOPAS is used as the base fiber material for its high optical transmission and high resistance to other chemicals. The finite element method with a perfectly matched layer as the boundary condition is employed for numerical explorations. The proposed sensor exhibits ultra-high relative sensitivity of 99.73% and ultralow effective material loss of 0.007 cm -1 at 1.6 THz frequency for Toluene in y polarization. This sensor also evinces a high birefringence of 4.16×10 -3 at 1.6 THz frequency. A maximum V parameter of 2.224 has been found at 2.2 THz which ensures the single-mode propagation of light. The sensor shows a very low confinement loss of 3.2×10 -11 dB/m and a high numerical aperture of 0.3574 at 1.6 THz frequency for Hydrogen Sulfide. This paper also concentrates on other important design parameters such as bending loss, mode field radius, beam divergence and effective area for serviceability of the sensor in the THz region. This sensor can be a very good candidate for various chemical detection as well as other applications in the terahertz regime.

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A Novel Hexahedron Photonic Crystal Fiber in Terahertz Propagation: Design and Analysis

Cited by 43 publications

References 21 publications

Modelling and simulation of novel liquid‐infiltrated PCF biosensor in Terahertz frequencies

Modelling and simulation of novel liquid‐infiltrated PCF biosensor in Terahertz frequencies

Design and simulation of rotated hexagonal porous core photonic crystal fibre with improved effective material loss and dispersion properties

Numerical Design and Investigation of Circularly Segmented Air Holes-Assisted Hollow-Core Terahertz Waveguide as Optical Chemical Sensor

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