Multiband terahertz absorbers using T-shaped slot-patterned graphene and its complementary structure
Multiband terahertz absorbers using T-shaped slot-patterned graphene and its complementary structure
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DOI：
10.1364/josab.404062
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发表时间：
2020-10
影响因子：
1.9
通讯作者：
K. Xu;Yijun Cai;Xianbo Cao;Yingjiang Guo;Yongliang Zhang;Qiang Chen
中科院分区：
文献类型：
--
作者：
K. Xu;Yijun Cai;Xianbo Cao;Yingjiang Guo;Yongliang Zhang;Qiang Chen
提出了一种基于单层周期性T型槽图案化石墨烯的太赫兹双频吸收体。通过改变T形狭缝图案化石墨烯的尺寸或费米能级，两个吸收带都将被调节。该吸收体具有偏振无关和入射角不敏感的特点。此外，其互补结构，即，利用周期性T形条带图案化的石墨烯，设计了另一种双频吸收体。此外，通过在正方形石墨烯晶格中周期性地加载四个T形槽和互补条，研究了两种三频吸收体。本文为设计具有多个吸收带的石墨烯基吸收体提供了一个重要的范例。
A dual-band absorber using monolayer periodically T-shaped slot-patterned graphene at terahertz frequencies is presented. By changing the dimensions or Fermi levels of the T-shaped slot-patterned graphene, both of the two absorption bands will be adjusted. The absorber has the characteristics of polarization independence and incident angle insensitivity. Also, its complementary structure, i.e., using periodically T-shaped strip-patterned graphene, is investigated to design another dual-band absorber. Moreover, two triband absorbers are studied through periodically loading four more T-shaped slots and complementary strips in square graphene lattices, respectively. This paper provides a significant paradigm for designing different graphene-based absorbers with multiple absorption bands.