300 GHz bending transmission of silver/polypropylene hollow terahertz waveguide

Xie, Guoxing; Zhong, Yi; Li, Guishun; She, Changkun; Lu, Xuehui; Yue, Fangyu; Liu, Shaohua; Jing, Chengbin; Cheng, Ya; Chu, Junhao

doi:10.1016/j.rinp.2020.103534

Cited by 13 publications

(5 citation statements)

References 35 publications

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“…Therefore, the bending loss is increased. It is worthwhile to note that at f=500 GHz and d1/normalΛ1=60%, a structure with R=1 cm shows a bending loss=3.2×10−4 dB/cm which is far better than previous works 22 , 23 …”

Section: Simulation and Resultsmentioning

confidence: 72%

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Low-loss flexible terahertz photonic crystal fiber

Qian

Yang

et al. 2023

Opt. Eng.

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.This paper presents a hybrid porous-core flexible photonic crystal fiber (PCF), which has the potential for low-loss guidance of broadband terahertz (THz) waves at low THz bands. Here, the cyclic olefin polymer TOPAS is used for the main material to increase the flexibility of PCF. The central hybrid porous-core area contains a circular and hexagonal design, which reduces the loss of PCF. Simulation results show that the proposed fiber has a very low confinement loss of 3.47 × 10 − 6 dB / cm at 500 GHz operating frequency. The bending loss at a bending radius of 1 cm is as low as 3.2 × 10 − 4 dB / cm. The negligible modal loss facilitates the flexible application to THz systems. Moreover, the fabrication of the proposed PCF design is compatible with widely used methods and technologies, including stacking and drawing, extrusion and drilling. This newly proposed hybrid design of the porous-core region can be considered as an improved version in the research of THz porous-core waveguides.

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Section: Simulation and Resultsmentioning

confidence: 72%

“…It is worthwhile to note that at f ¼ 500 GHz and d 1 ∕Λ 1 ¼ 60%, a structure with R ¼ 1 cm shows a bending loss ¼ 3.2 × 10 −4 dB∕cm which is far better than previous works. 22,23…”

Section: Simulation and Resultsmentioning

confidence: 99%

Low-loss flexible terahertz photonic crystal fiber

Qian

Yang

et al. 2023

Opt. Eng.

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“…Therefore, THz HWGs based on plastics tubes have great application potential. In this paper, based on the achievements of our research group in the preparation of THz HWGs based on plastics tubes, the research progress and related applications of several plastics tube-based THz HWGs, including polymer tube waveguide 5 , metal-coated HWG 6 and metal/dielectric HWG 7 , are summarized according to their structural characteristics.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of bendable low-loss terahertz hollow waveguides based on plastic tubes

Liu

Xie²,

Yu³

et al. 2023

Earth and Space: From Infrared to Terahertz (ESIT 2022)

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With the rapid development of terahertz (THz) science and technology, THz transmission has attracted widespread attention. Compared with wireless transmission in free space, THz wave can achieve bending, low-loss and stable propagation in the waveguide. Several types of THz waveguides have been reported. Among them, THz hollow waveguide (HWG) possesses the advantages such as simple structure, easy preparation and low cost. Recently, bendable and low-loss plastic THz HWGs has made progress in our group. This paper gives a review of the research progress in the field of the THz HWGs based on plastic tubing materials, including polymer tube waveguide, metal-coated polymer HWG and metal/dielectric polymer HWG. Problems existing in the plastic HWGs and key points of future research work were discussed with consideration of some issues aroused in practical applications.

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“…Первая проблема -отсутствие коммерчески доступных волноводов и волокон для доставки излучения указанного диапазона к труднодоступным объектам исследования и/или воздействия [8]. К настоящему времени существует достаточно большой перечень конструкций, использующих различные физические механизмы передачи излучения, например плоскопараллельные [9] или трубчатые [10] металлические волноводы, полимерные антирезонансные или фотонно-кристаллические волноводы [11,12], волокна со ступенчатым показателем преломления [13], пористые волокна [14] и плазмонные волноводы [15,16]. Однако во многом передача ТГц излучения на значительные расстояния с их помощью затруднена вследствие большой дисперсии, потерь излучения при распространении либо потерь излучения при вводе/выводе.…”

Section: Introductionunclassified

Сочетание Полого Сапфирового Волновода И Иммерсионной Линзы Для ТГц Эндоскопии Сверхвысокого Разрешения

Кучерявенко¹,

Zhelnov²,

Черномырдин³

et al. 2023

Оптика И Спектроскопия

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The development of terahertz (THz) imaging methods is hampered by the low spatial resolution of traditional diffraction-limited imaging systems, mainly due to the large wavelength of used radiation (from a few of mm to tens of µm). To solve this problem, we have proposed a new method of THz endoscopy with subwavelength spatial resolution, which is designed to study hard-to-reach areas of living organisms in vivo. A hollow-core sapphire tube with polytetrafluoroethylene outer coating is used as a waveguide, in which the antiresonant principle of radiation transmission is implemented. The waveguide and the immersion lens are optimized to provide high optical characteristics in a given wavelength range to ensure the best focusing. Two immersion lenses made of sapphire and silicon were developed and fabricated, which were then mounted on plane-parallel windows fixed on the rear end of the waveguide. The study of the field intensity distribution on the shadow side of the “waveguide–lens” system revealed a focal spot diameter of ≃0.2λ in the case of a lens made of sapphire and ≃0.3λ in the case of a lens made of crystal silicon at a wavelength λ = 500 µm, which significantly exceeds the Abbe diffraction limit. This agrees with our numerical predictions and demonstrates the promise of using the proposed endoscope for measurements with subwavelength resolution.

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300 GHz bending transmission of silver/polypropylene hollow terahertz waveguide

Cited by 13 publications

References 35 publications

Low-loss flexible terahertz photonic crystal fiber

Low-loss flexible terahertz photonic crystal fiber

Fabrication of bendable low-loss terahertz hollow waveguides based on plastic tubes

Сочетание Полого Сапфирового Волновода И Иммерсионной Линзы Для ТГц Эндоскопии Сверхвысокого Разрешения

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