维普中文期刊产品整合服务

Metamaterial-based octave-wide terahertz bandpass filters

查看全文 作　　者：ALI [1]MALEKI;AVINASH [1]SINGH;AHMED [1]JABER;WEI [1]CUI;YONGBAO [2]XIN;BRIAN [2]T.SULLIVAN;ROBERT [1,3,4]W.BOYD;JEAN-MICHEL [1]MÉNARD 高影响力作者 机构地区：[1]Department of Physics,University of Ottawa,Ottawa,Ontario K1N 6N5,Canada;[2]Iridian Spectral Technologies Ltd,Ottawa,Ontario K1G 6R8,Canada;[3]School of Electrical Engineering and Computer Science,University of Ottawa,Ottawa,Ontario K1N 6N5,Canada;[4]Institute of Optics and Department of Physics and Astronomy,University of Rochester,Rochester,New York 14627,USA高影响力机构 出　　处：《Photonics Research》索引2023年第11卷第4期,共7页高影响力期刊 基　　金：Natural Sciences and Engineering Research Council of Canada(RGPIN-2016-04797,STPGP/521619-2018);Canada Foundation for Innovation(35269)。 摘　　要：We present octave-wide bandpass filters in the terahertz(THz)region based on bilayer-metamaterial(BLMM)structures.The passband region has a super-Gaussian shape with a maximum transmittance approaching 70%and a typical stopband rejection of 20 dB.The design is based on a metasurface consisting of a metallic squarehole array deposited on a transparent polymer,which is stacked on top of an identical metasurface with a subwavelength separation.The superimposed metasurface structures were designed using finite-difference time-domain(FDTD)simulations and fabricated using a photolithography process.Experimental characterization of these structures between 0.3 and 5.8 THz is performed with a time-domain THz spectroscopy system.Good agreement between experiment and simulation results is observed.We also demonstrated that two superimposed BLMM(2BLMM)devices increase the steepness of the roll-offs to more than 85 dB/octave and enable a superior stopband rejection approaching 40 dB while the maximum transmittance remains above 65%.This work paves the way toward new THz applications,including the detection of THz pulses centered at specific frequencies,and an enhanced time-resolved detection sensitivity toward molecular vibrations that are noise dominated by a strong,off-resonant,driving field. 关 键 词：process. field. APPROACHING
相关文献

参考文献(30)

引证文献(5)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费