基于石墨烯的太赫兹透明吸波器设计

透明太赫兹吸波器既可在太赫兹波段实现吸波功能,又对可见光透明,隐蔽性高,因此其在电磁隐形等领域具有广泛应用。文中设计了一种基于石墨烯的太赫兹双频吸波器,它由方形加枝节的石墨烯上层宽带吸波结构和石墨烯-ITO 嵌套形下层窄带吸收结构构成,实现了独立可调的双频吸波功能。经仿真调试,该吸波器能够通过改变石墨烯费米能,分别在1.98~3.64 THz 范围内调节实现90%以上宽频带吸收率和在4.6~4.9 THz 范围内调节实现96%以上吸收率。经验证,该吸波器具有极化不敏感、宽入射范围等优点。

Design of Terahertz Transparent Absorber Based on Graphene

The transparent terahertz wave absorber can not only realize the absorbing function in the terahertz band, but also be transparent to visible light and has high concealment. Therefore, it has a wide range of applications in electromagnetic stealth and other fields. In this paper, a terahertz dual-frequency absorber based on graphene is designed. The absorber consists of a square-shaped and branch-shaped graphene upper-layer broadband absorber structure and a graphene-ITO nested lower-layer narrow-band absorber structure. It has independently adjustable dual-frequency absorbing function. Through simulation debugging, the absorber can adjust the graphene Fermi energy to achieve a wide-band absorption rate of more than 90% in the range of 1. 98-3. 64 THz and adjust the center frequency absorption rate of more than 96% in the range of 4. 6-4. 9 THz. It verifies that the absorber has the advantages of polarization insensitivity and wide incidence range.