一种双面周期开槽型可调太赫兹带通滤波器  

A Tunable Terahertz Bandpass Filter with a Slit Aperture Flanked by Symmetrically Distributed Parallel Grooves on Both Sides

作　　者：袁明辉[1] 赵堤 

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市现代光学系统重点实验室,教育部光学仪器与系统工程研究中心,上海200093

出　　处：《光子学报》2015年第3期53-57,共5页Acta Photonica Sinica

基　　金：上海市自然科学基金(No.11ZR1424900);上海市重点学科项目第三期项目(No.S30502);上海市教育委员会重点学科建设项目(No.J50505)资助

摘　　要：为实现低成本高效率的可调太赫兹带通滤波器,采用太赫兹时域波谱系统实验研究了一种在薄铝片上制作的中心开通槽两边双面对称周期性开浅槽的结构.实验结果表明由于双面耦合伪表面等离子体激元的增强透射效应,该滤波器垂直入射时在0.33THz处获得超过95%的高透射率,其透射波的发散角在5°左右.并且当滤波器侧向斜入射时透射峰一分为二,低频透射峰红移而高频透射峰蓝移;当滤波器俯仰方向斜入射时透射峰蓝移.A low-cost and high efficient tunable terahertz （THz） bandpass filter on aluminum slab with a center slit flanked by symmetrically distributed parallel grooves on both sides was experimentally analyzed by the terahertz time domain spectroscopy （THz-TDS）. Experimental results show that a high centre transmittance （〉95 %） can be obtained at 0.33 THz because of the enhanced transmission effect induced by symmetrically coupled spoof surface plasmon polaritons （SSPPs）. And the transmitted THz wave radiated from the slit aperture has a small divergence angle （approximately 5°）. Moreover, the transmission peak splits into two peaks：the low-frequency peak shows redshift and the high-frequency peak shows blueshift when the incident tilting angle increases, and the transmission peak blue shifts when the incident pitching angle increases.

关 键 词：物理电子学 太赫兹 滤波器 可调 伪表面等离子体激元 

分 类 号：TN713[电子电信—电路与系统]