太赫兹金属弹簧波导的研究  

Study on metal spring based terahertz waveguide

作　　者：董章华 赵佳宇 DONG Zhanghua;ZHAO Jiayu(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2022年第1期29-34,共6页Optical Instruments

基　　金：上海市晨光计划(18CG53)。

摘　　要：为深入了解金属弹簧波导对太赫兹波的传输效果,对不同螺线间距金属弹簧的太赫兹波传输特性进行了实验研究。实验结果表明,对于线径0.8 mm、外直径12 mm、长14 cm的金属弹簧,在3.5/4.4 mm等较大的螺距下,弹簧波导反而能在较大的带宽下传导太赫兹波,并具有良好的偏振保持能力。3.5/4.4 mm螺距弹簧的太赫兹传输带宽均约为0.9 THz,且在其峰值频率处的传输损耗分别约为0.2 cm^(-1)和0.27 cm^(-1)。此外,金属弹簧能将太赫兹模式束缚在空气芯内传输,而非通过金属螺线导引传输。该研究结果对金属弹簧波导在太赫兹技术中的应用具有一定参考意义。In order to understand the transmission effect of the metal spring waveguide on terahertz wave,the transmission characteristics of terahertz wave by springs with different helix spacings have been studied experimentally.The experimental results show that when the pitch is larger as 3.5/4.4 mm(with wire diameter of 0.8 mm,outer diameter of 12 mm and length of 14 cm),the metal spring waveguide can propagate terahertz wave in a larger bandwidth with the additional ability of polarization maintaining.The terahertz transmission bandwidth of metal springs with pitch of 3.5/4.4 mm are both about 0.9 THz,and the lowest transmission loss are about 0.2 cm^(-1) and 0.27 cm^(-1) respectively at their peak frequencies.In addition,it has been proved that the terahertz mode was confined inside the air core rather than being guided by the metal helix.The above results are helpful for applications of the metal spring waveguide in the field of terahertz technology.

关 键 词：太赫兹波 金属弹簧波导 弹簧螺线间距 偏振特性 

分 类 号：O451[理学—无线电物理]