低损耗传输太赫兹波的Topas多孔纤维设计  

Design of Topas porous fiber for low-loss Terahertz wave guiding

作　　者：王豆豆[1] 王丽莉[2] 

机构地区：[1]西安科技大学理学院,陕西西安710054 [2]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119

出　　处：《红外与激光工程》2013年第9期2409-2413,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(61275106);陕西省教育厅科研计划(2013JK1106);西安科技大学博士启动金(2012QDJ043);西安科技大学培育基金(201236)

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：0．4．1．5THz范围内的损耗小于0．2cm^-1；0．48-1．5THz范围内的色散为1．8±0．3ps·THz^-1·cm^-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。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 1.8±0.3 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.

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 

分 类 号：O451[理学—无线电物理]