【精品期刊】11 亚波长线栅太赫兹偏振分束器的研究.pdf

第37卷第3期 2013年5月激光技术 LASER 7rECHNOLOGY , May,2013 文章编号:1001—3806(2013)03—0297—04 亚波长线栅太赫兹偏振分束器的研究张蒙恩,王文涛,刘平安,李向军,刘建军,洪治+ (中国计量学院太赫兹技术与应用研究所,杭州310018) 摘要:为了提高工作在太赫兹波段偏振分束器的性能,采用激光诱导与化学镀铜的方法在聚酰亚胺衬底上制作了亚波长周期金属线栅太赫兹偏振分束器,并以返波振荡器作为太赫兹辐射源搭建了偏振分束特性测试系统。当入射波频率为340GHz、入射角为45。时,测得在入射波偏振在0。一180。变化过程中,该偏振分束器具有良好的偏振分束特性,,;~。结果表明,测试结果与时域有限元方法模拟结果基本吻合。关键词:光学器件;亚波长线栅;太赫兹;偏振分束器;激光诱导化学镀中图分类号: 文献标识码:A doi:.1001— Research ofsub-wavelength wire-grid terahertz polarizing beam splitters ZHANG Meng—ell,WANG Wen-tao,LIU Ping-an,L1 Xiang-jun,LIUJian{un,HONG Zhi (Centre forTHz Research,China JiliangUniversity,Hangzhou 310018,China) Abstract:In order improve theperformance of aterahertzpolarizing beam splitter,asub—wavelength period metal wire-酣d terahertzpolarizing beam sphtter,based on acopper grating onpolyimide(PI)substrate,was fabricated by the way oflaserinduced andnon·eleetrol” goodpolarization characteristics intherange of00~1800 polarization angle were verifiedexperimentally using backward wave oscillator thefixedfrequency of340GHz theincidentangle of extinction were measured forthe transmittedand reflectedbeams, broadband transmission ofTM wave ofthesplitte