{"title":"Dual-Band Polarization-Independent Terahertz Absorber Based on F-Shaped Multimode Structure","authors":"Daotong Li;Dongyi Sui;Kai-Da Xu;Dongxu Wang;Ying Liu;Siyuan Luo;Naoki Shinohara","doi":"10.1109/LPT.2024.3454175","DOIUrl":null,"url":null,"abstract":"In this letter, a dual-band polarization-independent terahertz (THz) metamaterial absorber (MA) based on metal-insulator-metal (MIM) configuration is proposed and measured. The flexible material polyimide is chosen as the substrate. The periodic metal array cell on the top surface is fabricated utilizing four F-shaped metal strips, and due to the high symmetry of the structure, the designed absorber is insensitive to polarization. Furthermore, the impact of structural parameters on the absorption characteristics is numerically investigated, and the results indicate that the absorption peak can be flexibly adjusted by changing the length of the top metal strip. The proposed MA achieves near-perfect absorption at 0.555 THz and 0.797 THz under normal TE and TM polarized incidence, with Q-factors of 23.56 and 45.28, respectively. This work provides a new design strategy for the realization of multi-band THz MA.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"36 19","pages":"1201-1204"},"PeriodicalIF":2.3000,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Photonics Technology Letters","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10663547/","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
In this letter, a dual-band polarization-independent terahertz (THz) metamaterial absorber (MA) based on metal-insulator-metal (MIM) configuration is proposed and measured. The flexible material polyimide is chosen as the substrate. The periodic metal array cell on the top surface is fabricated utilizing four F-shaped metal strips, and due to the high symmetry of the structure, the designed absorber is insensitive to polarization. Furthermore, the impact of structural parameters on the absorption characteristics is numerically investigated, and the results indicate that the absorption peak can be flexibly adjusted by changing the length of the top metal strip. The proposed MA achieves near-perfect absorption at 0.555 THz and 0.797 THz under normal TE and TM polarized incidence, with Q-factors of 23.56 and 45.28, respectively. This work provides a new design strategy for the realization of multi-band THz MA.
期刊介绍：
IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.
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