Terahertz absorber with high sensitivity in triple bands based on AlCuFe

IF 3.5 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-05-17 DOI:10.1016/j.photonics.2026.101566

Xinran Mao , Hongyu Li , Wen Gao , Mengsi Liu , Boxun Li

{"title":"Terahertz absorber with high sensitivity in triple bands based on AlCuFe","authors":"Xinran Mao , Hongyu Li , Wen Gao , Mengsi Liu , Boxun Li","doi":"10.1016/j.photonics.2026.101566","DOIUrl":null,"url":null,"abstract":"<div><div>Based on Dirac semimetal AlCuFe, a triple-band tunable terahertz absorber is proposed herein to reconcile the demands for high detection performance and practical applicability. Within the operational frequency range of 5 THz to 9 THz, three resonant absorption peaks are exhibited by the absorber, and an average absorption rate exceeding 98.4% is achieved. Using the finite element method via CST simulation technology was utilized to study the electromagnetic field distribution at the frequency of resonance. Combined with the impedance matching principle, the physical mechanism underlying the perfect absorption of the absorber has been qualitatively interpreted. Moreover, the effects of unit structure dimensions, BDS Fermi level, and environmental refractive index on the absorption rate were investigated. Its refractive index sensitivity can reach up to 4455 GHz/RIU, and the quality factor (Q - value) can reach a maximum value of 123.66, demonstrating excellent perturbation recognition ability. It exhibits remarkable application potential in scenarios where the capture of weak terahertz-band signals is required, such as medical detection and environmental monitoring. In addition, this absorber features a simple structural design, which is not only easy to fabricate but also has a certain tolerance for manufacturing errors, effectively enhancing its feasibility in actual production and application.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101566"},"PeriodicalIF":3.5000,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Photonics and Nanostructures-Fundamentals and Applications","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1569441026000660","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/5/17 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Based on Dirac semimetal AlCuFe, a triple-band tunable terahertz absorber is proposed herein to reconcile the demands for high detection performance and practical applicability. Within the operational frequency range of 5 THz to 9 THz, three resonant absorption peaks are exhibited by the absorber, and an average absorption rate exceeding 98.4% is achieved. Using the finite element method via CST simulation technology was utilized to study the electromagnetic field distribution at the frequency of resonance. Combined with the impedance matching principle, the physical mechanism underlying the perfect absorption of the absorber has been qualitatively interpreted. Moreover, the effects of unit structure dimensions, BDS Fermi level, and environmental refractive index on the absorption rate were investigated. Its refractive index sensitivity can reach up to 4455 GHz/RIU, and the quality factor (Q - value) can reach a maximum value of 123.66, demonstrating excellent perturbation recognition ability. It exhibits remarkable application potential in scenarios where the capture of weak terahertz-band signals is required, such as medical detection and environmental monitoring. In addition, this absorber features a simple structural design, which is not only easy to fabricate but also has a certain tolerance for manufacturing errors, effectively enhancing its feasibility in actual production and application.

查看原文本刊更多论文

三波段高灵敏度太赫兹吸收体

本文提出了一种基于Dirac半金属AlCuFe的三波段可调谐太赫兹吸收器，以满足高探测性能和实用性的要求。在5 ~ 9 太赫兹的工作频率范围内，吸收器出现3个共振吸收峰，平均吸收率超过98.4%。采用有限元法结合CST仿真技术研究了谐振频率处的电磁场分布。结合阻抗匹配原理，定性地解释了吸收器完全吸收的物理机制。此外，还研究了单位结构尺寸、BDS费米能级和环境折射率对吸收速率的影响。其折射率灵敏度可达4455 GHz/RIU，品质因子（Q -值）最大值可达123.66，具有优异的摄扰识别能力。在需要捕获弱太赫兹波段信号的情况下，如医疗检测和环境监测，它显示出显著的应用潜力。此外，该吸振器结构设计简单，不仅易于制造，而且对制造误差有一定的容忍度，有效地提高了其在实际生产和应用中的可行性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Photonics and Nanostructures-Fundamentals and Applications 工程技术-材料科学：综合

CiteScore

5.00

自引率

3.70%

发文量

审稿时长

62 days

期刊介绍： This journal establishes a dedicated channel for physicists, material scientists, chemists, engineers and computer scientists who are interested in photonics and nanostructures, and especially in research related to photonic crystals, photonic band gaps and metamaterials. The Journal sheds light on the latest developments in this growing field of science that will see the emergence of faster telecommunications and ultimately computers that use light instead of electrons to connect components.