Highly Birefringent Slotted Core Photonic Crystal Fiber for THz Wave Propagation

Islam, A. K. M. Sadrul; Khan, Md Moinul Islam; Chowdhury, Jubair Alam; Mehjabin, Fariha; Islam, Mohammad Rakibul

doi:10.3103/s1541308x20010021

Cited by 34 publications

(10 citation statements)

References 65 publications

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“…When k 0 denotes the wavenumber, the effective refractive index (imaginary part) and the operating wavelength are expressed by Im ( n eff ) and λ, respectively, and the confinement loss is calculated from the following equation [1, 39]:

\alpha =8.686\times {k}_{0}\times \mathrm{I}\mathrm{m}\left({n}_{\mathrm{e}\mathrm{f}\mathrm{f}}\right)\times {10}^{4}\,(\mathrm{d}\mathrm{B}/\mathrm{c}\mathrm{m})

…”

Section: Results Analysis and Discussionmentioning

confidence: 99%

Design of a dual spider‐shaped surface plasmon resonance‐based refractometric sensor with high amplitude sensitivity

Khan

Mehjabin

Chowdhury

et al. 2022

IET Optoelectronics

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This study presents an investigation on the performance of the sensitivity of a dual spidershaped surface plasmon resonance (SPR)-based photonic crystal fibre (PCF) refractive index sensor having unique design specifications. To evaluate the fibre guiding properties, Finite Element Method is used for utilising the monetarily accessible COMSOL Multiphysics version 5.3a. A gold layer has been used as the plasmonic material surrounding the fibre to ensure chemical stability, and a single fine coating of TiO 2 supported the improvement of gold attachment with the fibre. The structural air holes' design arrangement inside the PCF gives an enhanced sensitivity performance. The proposed PCF-SPR gives extremely reduced confinement losses. Numerous precise investigations on the fibre parameters show the highest amplitude sensitivity of 4233 RIU −1 in detecting the scope of the refractive index (RI) 1.32-1.41. 2.36 � 10 −6 and 1.18 � 10 −5 and are achieved as amplitude resolution and wavelength resolution, respectively. The highest confinement loss found for this sensor is recorded to be 6.22 dB/cm. The RI sensor can lead to the exact identification of organic chemicals and biological analytes for the proposed design specifications, providing good sensitivity with significantly reduced confinement loss.

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\alpha =8.686\times {k}_{0}\times \mathrm{I}\mathrm{m}\left({n}_{\mathrm{e}\mathrm{f}\mathrm{f}}\right)\times {10}^{4}\,(\mathrm{d}\mathrm{B}/\mathrm{c}\mathrm{m})

…”

Section: Results Analysis and Discussionmentioning

confidence: 99%

Design of a dual spider‐shaped surface plasmon resonance‐based refractometric sensor with high amplitude sensitivity

Khan

Mehjabin

Chowdhury

et al. 2022

IET Optoelectronics

Self Cite

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“…When t 2 is 80 µm, the absolute value of dispersion is between 0.47 and 6.6 ps (THz cm) −1 in the range of 1.75-1.975 THz, and the fluctuation range is significantly larger than the range at t 2 = 50 µm. In practical applications, the low and flat dispersion ensures the effective transmission of broadband terahertz waves [31]. Finally, the effective mode field area is analyzed.…”

Section: Resultsmentioning

confidence: 99%

Study on the high birefringence and low confinement loss terahertz fiber based on the combination of double negative curvature and nested claddings

Yuan¹,

Wang²,

Yan³

et al. 2021

J. Phys. D: Appl. Phys.

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A novel double negative curvature nested fiber structure is designed by adding extra circular cladding tubes to enhance the birefringence and reduce the confinement loss. The fiber structure is composed of eight circular cladding tubes and two semi-elliptical nested tubes. The transmission performances of terahertz fiber, including birefringence, confinement loss, dispersion and effective mode field area, are studied by changing the parameters of cladding tubes. In the frequency range of 1.75 - 2.6 THz, the broad bandwidth of 850 GHz with high birefringence (above 10-4) can be achieved. The confinement loss of y-polarization mode with the frequency of 2.575 THz can be as low as 0.00231 dB/cm. The waveguide dispersion coefficient is between ±0.188 ps/(THz•cm) in the frequency range of 2.0 - 2.475 THz. The maximum effective mode field area of x- polarization mode is 2.618×10-6 m2 at 2.6 THz.

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“…Light can escape from the core region, and this type of loss is related to the PCF structure, such as the air holes present inside the cladding. This can be represented mathematically by the equation below [33].

{\alpha }_{\mathrm{C}\mathrm{L}}=8.686\frac{2\pi f}{c}\mathrm{I}\mathrm{m}\left({\eta }_{\mathrm{e}\mathrm{f}\mathrm{f}}\right)

…”

Section: Quantitative Data and Discussionmentioning

confidence: 99%

Section: Confinement Lossmentioning

confidence: 99%

Topas‐based octa‐circular cladding and rectangular porous core photonic crystal fibre for terahertz waveguide

Mustafa

Islam

et al. 2023

IET Optoelectronics

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This article presents a novel design for guiding terahertz (THz) waves, which utilises a photonic crystal fibre with a porous core (PC‐PCF). This approach is substantiated by a Topas‐based octagonal‐shaped core with rectangular air slots. By utilising Finite Element Method and Perfectly Matched Layer boundary condition, the guiding properties of a structure consisting of octagonal air holes integrated with circular air slots in the cladding region have been investigated. The proposed structure exhibits a birefringence value of 0.05 and a low effective material loss of 0.013 cm−1. Moreover, it exhibits flattened dispersion measuring at a wide‐ranging frequency of 0.4 to 1.6 THz. In addition to that, the proposed structure offers 60% high core power fraction, 10−18 cm−1 confinement loss at 65% porosity of 290 μm core diameter and 1.6 THz frequency. Other significant waveguide properties: effective refractive index, effective area, spot size, and beam divergence of the proposed fibre are numerically analysed and discussed rigorously along with the fabrication viability of the fibre with existing techniques.

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Highly Birefringent Slotted Core Photonic Crystal Fiber for THz Wave Propagation

Cited by 34 publications

References 65 publications

Design of a dual spider‐shaped surface plasmon resonance‐based refractometric sensor with high amplitude sensitivity

Design of a dual spider‐shaped surface plasmon resonance‐based refractometric sensor with high amplitude sensitivity

Study on the high birefringence and low confinement loss terahertz fiber based on the combination of double negative curvature and nested claddings

Topas‐based octa‐circular cladding and rectangular porous core photonic crystal fibre for terahertz waveguide

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