{"title":"Graphene-based magnetically tunable multi-band terahertz absorber with switchable frequency","authors":"Zhenyan Wei, Yannan Jiang","doi":"10.1140/epjd/s10053-024-00845-3","DOIUrl":null,"url":null,"abstract":"<p>A magnetically tunable multi-band switchable frequency terahertz (THz) absorber based on graphene is proposed, and its absorption performance is analyzed using the <span>\\(4 \\times 4\\)</span> transfer matrix method. The results indicate that the proposed absorber achieves absorption amplitude tuning across multiple switchable THz frequencies by adjusting the static bias magnetic field. Moreover, both absorption and modulation depths exceed 90% for the left-handed circularly polarized wave. This performance can be attributed to the unequal Landau levels distribution of graphene in the quantum domain and the properties of photonic crystals, which include photonic bandgaps and optical localization. This study may have significant potential in various frequency-switchable components, such as circular polarization sensors, circular polarizers, and magnetic circular dichroism optical detectors.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 5","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The European Physical Journal D","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1140/epjd/s10053-024-00845-3","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
A magnetically tunable multi-band switchable frequency terahertz (THz) absorber based on graphene is proposed, and its absorption performance is analyzed using the \(4 \times 4\) transfer matrix method. The results indicate that the proposed absorber achieves absorption amplitude tuning across multiple switchable THz frequencies by adjusting the static bias magnetic field. Moreover, both absorption and modulation depths exceed 90% for the left-handed circularly polarized wave. This performance can be attributed to the unequal Landau levels distribution of graphene in the quantum domain and the properties of photonic crystals, which include photonic bandgaps and optical localization. This study may have significant potential in various frequency-switchable components, such as circular polarization sensors, circular polarizers, and magnetic circular dichroism optical detectors.
期刊介绍：
The European Physical Journal D (EPJ D) presents new and original research results in:
Atomic Physics;
Molecular Physics and Chemical Physics;
Atomic and Molecular Collisions;
Clusters and Nanostructures;
Plasma Physics;
Laser Cooling and Quantum Gas;
Nonlinear Dynamics;
Optical Physics;
Quantum Optics and Quantum Information;
Ultraintense and Ultrashort Laser Fields.
The range of topics covered in these areas is extensive, from Molecular Interaction and Reactivity to Spectroscopy and Thermodynamics of Clusters, from Atomic Optics to Bose-Einstein Condensation to Femtochemistry.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
