Design of Topas porous fiber for low-loss Terahertz wave guiding
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摘要: 以新型聚合物材料Topas环烯烃共聚物（COC）为基质，设计了一种能够低损耗传输太赫兹波的多孔纤维。应用全矢量有限元方法对传输特性的研究结果表明，该Topas多孔纤维在太赫兹波段具有宽带低损耗、低色散的特性：0.4~1.5 THz范围内的损耗小于0.2 cm-1；0.48~1.5 THz范围内的色散为1.80.3 psTHz-1cm-1。所设计的多孔纤维兼顾了结构简单、易于制备的特点。研究结论为Topas太赫兹波导的制备提供了理论指导。
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关键词:
- 太赫兹波 /
- Topas 环烯烃共聚物 /
- 聚合物多孔纤维 /
- 有限元方法
Abstract: A kind of porous fiber for low-loss Terahertz wave guiding was designed based on Topas cyclic olefin copolymer(Topas COC). Topas COC is a kind of novel Terahertz low-loss material. Terahertz wave was well confined in a series of subwavelength air holes, which were arranged in base material with triangular lattice. Propagation properties of the designed porous fiber were investigated by using the full-vector finite element method. The results indicated that the designed Topas porous fiber had low loss and low dispersion properties within Terahertz frequency. The loss was less than 0.2 cm-1 from 0.4 THz to 1.5 THz, and the dispersion was 1.80.3 ps/THz/cm within 0.48-1.5 THz. The designed fiber structure was relatively simple and feasible for fabrication. It can be fabricated by the thermo-drawing techniques of polymer preforms invented by our group. The results provided theoretical references for fabrication of Topas Terahertz low-loss and flexible fiber waveguides.-
Key words:
- Terahertz wave /
- Topas COC /
- polymer porous fiber /
- finite element method
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