Tunable narrow terahertz absorption of one-dimensional photonic crystals embedded with Dirac semimetal-dielectric defect layers

被引：7

作者：

Wang, Qin ^{[1
]}

Zhang, Liwei ^{[1
,2
]}

机构：

[1] Henan Polytech Univ, Sch Phys & Elect Informat Engn, Jiaozuo 454000, Henan, Peoples R China

[2] Hami Yuxin Energy Ind Res Inst Co Ltd, Hami 839000, Peoples R China

来源：

APPLIED OPTICS | 2019年 / 58卷 / 31期

基金：

中国国家自然科学基金;

关键词：

PLASMON-INDUCED TRANSPARENCY; PERFECT ABSORPTION; SURFACE-PLASMONS; GRAPHENE; ABSORBER;

D O I：

10.1364/AO.58.008486

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The absorption characteristics of one-dimensional photonic crystals embedded with Dirac semimetal-dielectric defect layers are studied using the transfer matrix met hod. Numerical results show that our proposed structure can realize near-perfect narrow absorption for its strong field localization effects. The absorption frequency is tunable by adjusting the Fermi energy of the Dirac semimetal, temperature, permittivity of the dielectric, and the structural parameters. Moreover, double or multiple absorption channels can be achieved by changing the structure. Furthermore, the absorption performance is wide-angle and insensitive to polarization of the incident wave. Such properties exhibit potential value in designing selective absorbers and thermal detectors. (C) 2019 Optical Society of America

引用

页码：8486 / 8494

页数：9

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