Low Loss Single-Mode Porous-Core Kagome Photonic Crystal Fiber for THz Wave Guidance

Hasanuzzaman, G. K. M.; Habib, Selim; Razzak, S. M. Abdur; Hossain, Md. Anwar; Namihira, Y.

doi:10.1109/jlt.2015.2459232

Cited by 73 publications

(20 citation statements)

References 22 publications

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“…Within the frequency range 0.5-0.9 THz the proposed fiber shows ultralow EML between 0.0103-0.0145cm -1 , which is only between 4.9% and 7.3% of the bulk material loss of the background material. The EML results of this fiber are clearly lower than previously reported values for other designs [14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Investigation of the EML of the terahertz radiation in Fig.…”

Section: I I N U M E R Ic a L R E S U L T S A N D Discussionmentioning

confidence: 59%

“…Again, the EML was reduced by 29% [20] whereas previous work in this field resulted in higher loss [14]. A kagome structure [21] exhibited a low absorption loss of 0.035 cm -1 and variation of dispersion of 0.61 ± 0.14 ps/THz/cm. Two recent hybrid designs demonstrated an improvement in EML of 0.037 cm −1 [22] and 0.019 cm −1 [23], and dispersion coefficients of 0.40 ± 0.04 ps/THz/cm [22] and 0.95 ± 0.05 ps/THz/cm [23], respectively.…”

Section: Introductionmentioning

confidence: 99%

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Low Loss and Low Dispersion Fiber for Transmission Applications in the Terahertz Regime

Rana

Rakin

Subbaraman

et al. 2017

IEEE Photon. Technol. Lett.

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Section: I I N U M E R Ic a L R E S U L T S A N D Discussionmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Low Loss and Low Dispersion Fiber for Transmission Applications in the Terahertz Regime

Rana

Rakin

Subbaraman

et al. 2017

IEEE Photon. Technol. Lett.

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“…Perfectly-matched layer boundary conditions were used to accurately calculate the confinement loss. The main guiding parameters, which define the performance of a PCF are phase and group birefringence, waveguide dispersion and effective material loss (EML) and are defined mathematically as [9], [11].…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Highly Birefringent, Low-Loss, and Near-Zero Flat Dispersion ENZ Based THz Photonic Crystal Fibers

et al. 2020

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In this paper, we present and compare two experimentally feasible photonic crystal fiber (PCF) designs (Type-I and Type-II) which ensure near-zero flattened dispersion with ultra-high phase and group birefringence at THz frequencies. Both structures are based on a subset of a triangular array of circular air-holes, which define the cladding of the PCF and a central elliptical air-hole which breaks the symmetry of the structure, thus introducing high levels of birefringence. Additionally, we investigate the possibility of further enhancing the birefringence properties of Type-II structure by selectively filling the air-holes with Potassium Chloride (KCl) as strong Epsilon-Near-Zero (ENZ) material. Our investigation reveals that significant enhancement of birefringence can be achieved than its original counterpart with birefringence to be as high as 0.0627 at 6.2 THz and near-zero flat dispersion of −0.54 ± 0.04 ps/THz/cm over the frequency range of 6.2−6.3 THz.

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“…2(e) were attained only considering the waveguide dispersion since the material dispersion of the HRS is negligible within the desired frequency range, 0.5 to 4.0 THz. They were calculated as [7] (4)…”

Section: Comparison Of the Type 1 And Type 2 Pcfsmentioning

confidence: 99%

“…Recently, PCFs have also been advocated for THz applications [7][8][9]. There are three kinds of PCFs recently employed in the THz regime.…”

Section: Introductionmentioning

confidence: 99%

Circular hole ENZ photonic crystal fibers exhibit high birefringence

et al. 2018

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Abstract-A novel photonic crystal fiber (PCF) design that yields very high birefringence is proposed and analyzed. Its significantly enhanced birefringence is achieved by filling selected air holes in the cladding with an epsilon-near-zero (ENZ) material. Extensive simulation results of this asymmetric material distribution in the lower THz range demonstrate that the reported PCF has a birefringence above 0.1 and a loss below 0.01 cm -1 over a wide band of frequencies. Moreover, it exhibits near zero dispersion at 0.75 THz for both the X-and Y-polarization modes and a birefringence equal to 0.28. This THz PCF is then scaled successfully to optical frequencies. While the high birefringence is maintained, this optical PCF has a very high loss in its Y-polarization mode and, consequently, yields single-polarization single-mode (SPSM) propagation, exhibiting near zero dispersion at the optical telecom wavelength of 1.55 μm. The ideal ENZ materials used for these conceptual models are replaced with realistic ones for both the THz and optical PCF designs. With the currently available ENZ materials, the realistic PCFs still have a high birefringence, but with higher losses compared to the idealized results. Future developments of ENZ materials that achieve lower loss properties will mitigate this issue in any frequency band of high interest.

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Low Loss Single-Mode Porous-Core Kagome Photonic Crystal Fiber for THz Wave Guidance

Cited by 73 publications

References 22 publications

Low Loss and Low Dispersion Fiber for Transmission Applications in the Terahertz Regime

Low Loss and Low Dispersion Fiber for Transmission Applications in the Terahertz Regime

Highly Birefringent, Low-Loss, and Near-Zero Flat Dispersion ENZ Based THz Photonic Crystal Fibers

Circular hole ENZ photonic crystal fibers exhibit high birefringence

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