太赫兹频段高折射率超材料的设计和特性研究

Design and Characteristics of High Refractive Index Metamaterials in Terahertz

设计了太赫兹频段的高折射率超材料,该结构是通过在介质板的两侧对称的蚀刻“双开口环”型金属贴片而构成.研究结果表明:当电磁波垂直入射的情况下,谐振频率(0.52THz)附近的折射率高达200,且在0.51THz到2THz频段范围内,折射率均大于70.该超材料具有结构简单、便于加工,宽带等优点,在太赫兹波通信、成像等方面有广阔的应用前景.

We proposed a high refractive index metamaterial that is formed by symmetrically etching a "double split ring" typed metal patch on both sides of a dielectric plate.The simulation results show that,for normally incident electromagnetic wave,the refractive index in the frequency range from 0.51-2 THz is greater than 70 and the refractive index up to 200 at 0.52 THz.The metamaterial has the advantages of simple structure and wideband,which makes the proposed metamaterial have broad application prospects in terahertz wave communication and imaging.