Wide-range tunable, dual-band, background refractive index insensitive terahertz absorber based on graphene and Dirac semimetal

被引：5

作者：

Wang, Shuaizhao ^{[1
]}

Xu, Ronghui ^{[1
]}

Qin, Zujun ^{[1
]}

Liu, Houquan ^{[1
]}

Deng, Shijie ^{[1
]}

Chen, Ming ^{[1
]}

Cheng, Yu ^{[1
]}

Yuan, Libo ^{[1
]}

机构：

[1] Guilin Univ Elect Technol, Sch Elect Engn & Automat, Photon Res Ctr, Guilin, Peoples R China

来源：

OPTICAL ENGINEERING | 2021年 / 60卷 / 02期

关键词：

wide-range tunable; refractive index insensitive; graphene; Dirac semimetal; METAMATERIAL ABSORBER; FUTURE;

D O I：

10.1117/1.OE.60.2.027102

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this study, we propose a dual-band wide-range tunable terahertz absorber based on graphene and bulk Dirac semimetal (BDS), which consists of a patterned BDS array, dielectric material, continuous graphene layer, and gold mirror. Simulation results show that the absorption at 3.97 and 7.94 THz achieve almost 100%. By changing the Fermi energy of graphene and BDS, the resonance frequency can be tuned between 3.97 and 9.28 THz. In addition, we found that when the background refractive index changes, the absorption is almost the same. This feature will broaden its applications. Finally, the influence of structural parameters and incident angles on device performance is discussed. The proposed absorber may have potential applications in photoelectric sensors and other optoelectronic devices. (C) 2021 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：11

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