Exploring Low Loss and Single Mode in Antiresonant Tube Lattice Terahertz Fibers

We propose and numerically analyze various hollow-core antiresonant fiber (HC-ARF) for operation at terahertz frequencies. We compare typical HC-ARF designs with nested and adjacent nested designs while analyzing performance in terms of loss and single-mode guidance of terahertz waves. With optimize...

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Bibliographic Details
Published in:IEEE access 2020, Vol.8, p.113309-113317
Main Authors: Sultana, Jakeya, Islam, Md. Saiful, Cordeiro, Cristiano M. B., Habib, Md. Selim, Dinovitser, Alex, Ng, Brian Wai-Him, Abbott, Derek
Format: Article
Language:English
Subjects:
antiresonant fiber
Couplings
Dielectrics
Electron tubes
Lattice vibration
Lattices
Metals
Optical losses
Propagation losses
Terahertz
Terahertz frequencies
Transmission loss
Tubes
waveguide
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Summary:We propose and numerically analyze various hollow-core antiresonant fiber (HC-ARF) for operation at terahertz frequencies. We compare typical HC-ARF designs with nested and adjacent nested designs while analyzing performance in terms of loss and single-mode guidance of terahertz waves. With optimized fiber dimensions, the fundamental core mode, cladding mode, core higher-order modes (HOMs), and the angle dependence of adjacent tubes are analyzed to find the best design for low loss terahertz transmission. Analysis of the fiber designs shows that the nested tube-based antiresonant fiber exhibits lower transmission loss and superior HOM suppression, exceeding 140. The nested HC-ARF is feasible for fabrication using existing fabrication technologies and opening up the possibility of efficient transmission of terahertz waves.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.3003035